Lt. Steve Drumm asks Perry Mason to defend his good friend, police Sgt. Dave Wolfe, who is accused of having killed Joe Oliver, who had been pursuing his sister Susan and was believed to have just beaten her. Lt. Drumm and Sgt. Wolfe arrived at Susan's apartment building with Sgt. Wolfe in a rage about Oliver. He goes alone to Susan's apartment but, when Lt. Drumm hears gunshots, he finds Oliver's body on the ground and Sgt. Wolfe standing above with his gun in his hand. Sgt. Wolfe says he was knocked unconscious and Oliver was shot with the Sergeant's gun. When Susan wakes, however, she denies it was Oliver who beat her but refuses to say who it was. Oliver was the building superintendent where Susan lived but at least six residents heard her scream for help but didn't want to get involved. For Perry to prove Dave Wolfe's innocence, he will have to determine who among them made their way to Susan's apartment and killed the wrong man, while Lt. Drumm is working to prove Wolfe's guilt.
—garykmcd