From The Perry Mason TV Show Book (Revised)
Jimmy Anderson, Lieutenant Andy Anderson’s cousin, has been promoted from a street beat to a patrol car. On his first night out, Jimmy and his partner Otto Norden come across a robbery at the Wilson Plastics Company. A shooting occurs and Norden is killed.

Andy can’t believe it, but evidence points to Jimmy having been involved in a burglary while still on his street beat. Andy is angry and confused when Jimmy is suspended from the force.

Perry happens to be the attorney for Wilson Plastics and is on the scene when the night watchman, Ralph Pearce, is found strangled to death. Andy asks Perry to defend Jimmy.