The homeless girls know who the killer is and try to get in contact with Henrik, but the killer is after them and the girls have to run for their lives. Meanwhile, Saga finds a match for the killer's fingerprint.
It becomes apparent that the case isn't over and Saga and Martin race to prevent another terrorist attack. Saga faces a decision that may destroy her friendship with Martin.
The investigation on Tommy continues but his mother, who is still in police custody, refuses to cooperate. Niels Thormod comes up in the investigation again.
Saga and Martin have a sketch of the suspect, but can they get there in time to avert 'The Graduation'? Their friendship is placed under strain by Martin's inquiry into Saga's past.
Henrik believes he found the connection between all victims and an unexpected finding ends up on the investigation board. At the same time, the crack between him and Saga is greater than ever.