Plot

Erin, Frank and Danny work together within the system to find justice when a rape case's primary suspect is protected by diplomatic immunity.

Although initially skeptical, eager beaver Jamie proves a quick student again when his laid-back beat cop mentor claims simple observation is the best tool to catch criminals. The third of three NYU campus rape victims hands enough evidence for Danny to make Sebastian Calso, the son of Argentinian deputy consul Claudio Calso, his prime suspect. Sebastian is a college buddy of the victim's fiancé, Blake Woods, Diplomatic immunity isn't waived, which remains a problem even after Frank sneakily gets inadmissible DNA evidence.—KGF Vissers

Three female students are walking in the city when the group breaks up. One of the students, Courtney Thurman, gets followed, chased by a black SUV and she gets grabbed by a man in a mask. When Detective Danny Reagan appears on the scene by himself, a police officer briefs Danny that the man grabbed Courtney and ripped off her clothes, but he did not finish the deed. Danny remarks that it is the second sexual assault in the same night and, with the same motives, Danny declares that it is a sexual predator on a spree.

At the Reagan house, Henry is teaching Jamie how to twirl a classic police baton while his girlfriend, Sydney, is trying to talk about their wedding, but Jamie is preoccupied with the baton. Erin figures out that something is up, but Sydney denies it. Sydney declares that she is happy that Jamie is doing something he loves. Erin tells her that she has every right to be worried since Jamie was on his way to law school and then decided to be a cop. Sydney is worried that Jamie will enjoy his job more than talking to her. Erin tells her not to take it personally, it's not her, it's the job. Erin's mother used to say the same thing about women not being able to compete against a gun and a shield.

Danny interviews Courtney but she is so distraught about the incident, that she can't remember anything that happened during the attack. Danny gets alerted that another attack has taken place 8 blocks away from where Courtney was attacked. In a restaurant, Frank is having a quiet dinner alone with Kelly Davidson. Kelly wonders how having dinner alone in a restaurant could be possible. Frank admits that he may have previously saved the owner's life and the owner did Frank a favor or was being generous. Frank is interrupted by a phone call and is forced to cut dinner short. Kelly asks Frank if she is going to see him later. He answers probably not. Kelly asks if there is anything he'd like to share and he pours his wine into her glass. Frank gives her a kiss and apologizes for having to leave. Kelly then takes out her phone and calls her news desk saying that something is happening in Manhattan North, but it is not going over the police radio.

Danny arrives at the newest crime scene and finds out that another student named Lauren Ryder was attacked. Her attacker beat her up and raped her. Danny is surprised that this attacker finally had the courage to get what he wanted. Lauren did manage to fight back enough to get a glimpse of her attacker and to give a partial identification before she is taken away in an ambulance. Frank is briefed by his assistant, Detective Baker, at police headquarters. Frank suggests that the victim's families should be made aware of the crimes before the press does. At that moment, Frank looks at the TV and sees Kelly reporting live from the crime scene. Frank sighs as he is aware that Kelly knew information about the crime and reported it.

Danny continues investigating the case. A rough sketch is being released to the media while Danny's boss, Sgt. Sid Gormley, goes through surveillance video hoping to catch a glimpse of the suspect's car. At a press conference, Frank assures the public that patrols on campus have been double and more foot patrols have been added. Kelly and a fellow reporter ask if there are any suspects. Frank answers that there are no suspects and acknowledges the other reporter instead of Kelly. Another reporter asks if there is a description and Kelly follows suit again. Frank answers the question and looks at the other reporter again instead of Kelly. Kelly asks if there are any firm leads. Frank answers that he already answered that question and he ends the press conference. Kelly feels embarrassed.

At the hospital, Danny meets with Lauren's father, Walter, and declares that he will get the guy who attacked his daughter. Danny asks if there are any ex-boyfriends that might have attacked her. Walter denies this. Walter is upset about what has happened to his daughter. Lauren is the only thing he has since her mother had died 15 years earlier. Jamie and Sgt. Anthony Renzulli are sitting by a fountain having lunch. Jamie asks if they should be doing something. Sgt. Renzulli claims that they are doing something: the art of nothing. Sgt. Renzulli says that cops need to focus on observing their surroundings. Sgt. Renzulli asks Jamie to look at a couple sitting on park benches. He asks Jamie what he thinks the man is doing. Jamie answers that he is reading a newspaper. Renzulli points out that is what he wants his wife to think. The man with the newspaper is actually looking at a couple of blond ladies doing Tai Chi. Renzulli points out another gentleman walking in the park with a suit and he pats his hip. Jamie believes he is checking for his wallet. Renzulli asks him who puts their wallet in their hip pocket? The man in a suit has a gun. Jamie gets up from the table and goes to arrest him. Renzulli stops him showing him that the man is a cop and all is well.

Danny shows Courtney a sketch of the man who attacked her, but Courtney says that it doesn't help her remember anything about him. Courtney's friend, Renee, and Courtney's boyfriend, Blake, arrive at her dorm and Danny shows them the sketch, but neither one of them recognize anyone on campus. Danny asks them if they remember anything or see anything to call him. Danny also noticed a tattoo on Blake's arm. Back at headquarters, Sgt. Gormley got a partial license plate off of the SUV which results in two strong leads, Vincent Harrah and Sofia Calso. Both of them have black SUVs that partially match the license plate of the car used in the attacks. Danny goes to interview Vincent. When Danny arrives at Vincent's apartment, Vince tries to flee by jumping off the fire escape and he injures his leg. Danny catches Vincent and arrests him, but Vincent claims that he was at Yankee Stadium. Sgt. Gormley confirms Vincent's alibi.

Danny goes to interview Sofia. Danny asks Sofia if the car is hers which she admits. Danny asks where she was the previous night. She claims she was at a charity auction, but she didn't drive her car and took a town car. Danny asks for the information of the company she used. Sofia becomes offended and declares that her husband is the Deputy Counsel of Argentina and she has diplomatic immunity. Danny tells Sofia that her car partially matches a car that was involved in the attacks. Sofia refutes this. Danny asks if anyone else had access to the car and Sofia refuses to further answer any more questions, but she does admit that her son does attend college in New York. Danny arrives at Sebastian Calso's college and, as he tries to question him, he meets Claudio Calso. Claudio asserts his son's diplomatic immunity as well. Danny informs Claudio of the attacks and when Claudio asks Sebastian if he knows anything, Sebastian simply shrugs his shoulders and walks away with his father. Danny strongly suggests that Sebastian is the suspect in the case, but Sgt. Gormley reminds him that a rough sketch and diplomatic immunity has made this case more difficult and that the Commissioner's office is involved in the case as well.

Commissoner Reagan meets with Claudio at One Police Plaza. Frank offers Claudio a cup of coffee and tells him that this isn't the first time they have met. Frank and Cladio had met when Frank was Chief of the Department. Frank tells him that he had been a police officer for 30 years before becoming Commissioner, but he was always a father first. Frank would always let his children know that they came first before the job, but he also let them know that, if they had done wrong, he would be as firm with them as any other lawbreaker on the street. Claudio says that is admirable. Frank asks Claudio to waive his son's immunity. Claudio claims his son is innocent. Frank asks that Claudio should allow the police to rule him out as a suspect by conducting an interview and providing a DNA sample. Claudio claims that would be a breach of diplomatic protocol and refuses. Claudio leaves. Detective Baker reenters the Commissioner's office and takes the coffee cup to the lab to obtain a DNA sample.

While Jamie and Sgt. Renzulli are on patrol, Jamie notices a guy walking down the street wearing a bulging coat. Jamie is suspicious that he is wearing a coat on a warm day. When Jamie approaches, the man tries to flee. As he flees, Jamie catches him and Sgt. Renzulli recovers a gun and some devices. Sgt. Renzulli congratulates Jamie on apprehending his first gun collar.

The lab results come in and it shows a partial match to the DNA found from when Lauren was raped, but Danny feels that it is pointless because Sebastian is untouchable due to diplomatic immunity. Frank meets up with Erin for a late lunch and shares his plan to send the DNA report to Argentina to hope that the country will revoke Claudio's diplomatic immunity. Frank also remembers that Erin had previously worked on a diplomatic immunity case and she decides to see if there is another way to help solve the case. As they finish their lunch, Kelly appears on television reporting that the NYPD does have a suspect, but he may walk free because of diplomatic immunity. Frank brings in Mayor Frank Russo and he says that the issue would become a state department problem and it wouldn't be the city's problem anymore. Danny meets up with Walter and informs him that his hands are tied. This angers Walter and he vows that if the police won't do anything maybe he should. At Sunday dinner, Danny and Jamie agree that diplomatic immunity is a way for people to abuse the system. Sydney challenges Danny's opinion by saying that diplomatic immunity may not be perfect, but it has a purpose. Sydney then suggests female American diplomats who get detained in the Middle East without having immunity. As dinner finishes, Frank gets a text saying that Argentina refuses to waive diplomatic immunity. As Frank is washing dishes, Erin comes in with some new information.

Danny finds Sofia and presents her with a material witness order due to her car being used in a class B felony and declares that her diplomatic immunity was negated after she had divorced Claudio which she failed to disclose to Danny. Also he says that she should make her son grant an interview since she controls his trust fund. As Sebastian is being brought in for questioning, Walter shows up looking for justice. Danny stops him and notices a bulge in Walter's coat pocket. Danny tells him, if he pats him down and finds a gun, it's a class C felony which would force him to arrest Walter and it would carry a three year prison sentence. He then tells Walter to leave and throw his gun into the river. Walter agrees and leaves.

At police headquarters, Sebastian complains that it is much too hot in the interrogation room. When Danny arrives, Sebastian's lawyer reminds him that, although Sebastian has agreed to the interview, he still will not give up his diplomatic immunity. Danny asks Sebastian where he was the night of the attacks. Sebastian gives up arrogant answers. Danny says that it's not funny that a girl got raped. The evidence speaks for itself: Sebastian's car was at the scene, the victim identified Sebastian, and Danny suggested that if Sebastian took a DNA test, it would solve the case. Danny mentions that Sebastian's tattoo looks nice and this causes Sebastian to leave immediately. After he leaves, Sgt. Gormley and a lab technician enter the room. Sebastian touched the door handle with his sweaty hands and a few drops of sweat were on the table which allowed them to obtain a DNA sample. Danny then asks the question: Why does the boyfriend of a victim have the same tattoo? Danny interviews Blake about his tattoo. It belongs to a secret society at school called Wolf and Key of which he and Sebastian are members. Danny asks Blake why he would protect someone who attacked his girlfriend. Among some tears, Blake confesses that he was the one who attacked Claudia and not Sebastian. When pressed further, Blake admits that it was part of an initiation that Sebastian came up with. Blake is now charged as an accessory to aggravated to rape and all the members of the Wolf and Key are arrested.

Frank is shown in his office on the phone with Kelly and he tells her that it would be best if they stop seeing each other. Claudio arrives in Frank's office where he was told about his son's interview and that his DNA was left behind in the room. The DNA collected matches the DNA that was collected from Lauren's attack, but Claudio is claiming that the evidence wouldn't matter because of diplomatic immunity. Frank does accept the fact that Sebastian does have immunity in the United States, but he does not have immunity in his home country of Argentina. Frank has sent a copy of the DNA report to the Buenos Aires Police Department which matches a previous case that Sebastian is now linked to. Frank gives Claudio 24 hours to return Sebastian to Argentina where he will be tried, convicted and sent to Mendoza prison or he can waive Sebastian's immunity and risk getting a fair trial in New York.

Jamie is sitting at Henry's house looking at old pictures. Henry asks Jamie how the first few weeks on the job are going. Jamie says that every time he tries to do something, his sergeant tells him how to do it differently. Henry gives his grandson some advice: Good cops are made by the world they police. Times change and so did the policing, but he should listen to his sergeant and become his own kind of police. Jamie finds a picture of Danny wearing a Blue Templar pin and asks Henry about it. Henry tells Jamie that the Blue Templar was formed to clean up the department, but eventually it became just another club of police officers drinking and telling war stories. Henry then dismisses the talk and turns on the television to check on the New York Jets.

The next morning, Danny brings in Sebastian to finally face charges of rape which ends the case. That night, Henry finds a gift of a cigar box on Frank's front porch with a card that says, "Sorry, Kelly". Erin asks who are they from and Frank replies that it is from the mayor who is being interviewed on the news. The mayor takes the credit for the crime being solved and that Argentina took the mayor's advice and did the right thing. Frank complains that, if you want a pat on the back, not to become a cop, but Erin, Danny, and Henry all praise Frank as he reminds Danny not to smoke the cigar in the house.