Stoner musicians Pedro DePacas and Anthony "Man" Stoner unknowingly smuggle a van - made entirely of marijuana - from Mexico to Los Angeles with incompetent Police Sergeant Stedenko hot on their trail.
A series of misunderstandings leaves an advertising executive with a campaign for a product which has not yet been invented, while he romances his rival in the guise of its inventor.
A Manhattan insurance clerk tries to rise in his company by letting its executives use his apartment for trysts, but office politics and his own romantic hopes complicate matters.