Upon arriving in Los Angeles, gangster Katcher leases a deserted Laurel Canyon mansion as his base of operations. He plans to rob the Hollywood Sports Arena and hires some local thugs as his crew. McDonald is the lonely cashier at the arena whom Katcher proceeds to court, and soon he has
her involved as well. The robbery is successful, and Katcher manages to elude the police, who try to nab him in a wild chase. Katcher steals some acid from a chemical warehouse and puts it in a bathtub. This he uses to destroy the bodies of the accomplices whom he has already done away with.
Assuming that everyone who had helped him is dead, Katcher heads for Rio. But after his mon...