Chicago psychiatrist Judd Stevens (Roger Moore) is suspected of murdering one of his patients when the man turns up stabbed to death in the middle of the city. After repeated attempts to convince cops Rod Steiger and Elliott Gould of his innocence, Dr.Stevens is forced to go after the real villains himself, and he finds himself up against one of the city’s most notorious Mafia kingpins.

This day-in-the-life cult comedy focuses on a group of friends working at Sully Boyar’s Car Wash in the Los Angeles ghetto. The team meets dozens of eccentric customers — including a smooth-talking preacher, a wacky cab driver and an ex-convict — while cracking politically incorrect jokes to a constant soundtrack of disco and funk. Some of the workers find romance as the day moves along, but most are just happy to get through another shift.