A motorcycle gang lays siege on the Hollywood police station and demands the release of gang leader Tito's brother, who is in prison for murder.

Gideon King, a washed-out private detective, witnesses a jewelry store robbery; the robbers stash the loot in the trunk of a car, then flee in a second vehicle.

Protecting a witness in a trial of an underworld boss, McCarren and Rado begin to suspect corruption in high places.