A telegraph postal union worker has no luck when asks a pretty co-worker to marry him. She says he'd have to be a magician to get her to say yes. Things are complicated when, as a favor to a stuttering acquaintance, he takes his overweight girlfriend to the movies to propose to her by proxy. Unfortunately the pretty co-worker spots him with her in the theater, so he begins to learn magic tricks.
Frank and Barny are agents of the PBI - Pornographic Bureau of Investigation, sent by Chief Rank, Head of Vice, L.A. District, to go down on the dirty crime spots of Hollywood. Mousie's Hot Shoppe is an adult bookstore where the owner is as much titillated as his customers by the material on sale. The agents are surprised to uncover that Mousie knows Chief Rank all too well, but it comes handy as he is willing to be an informer. So, the agents "discover" the Travelling House of Pleasure, a door-to-door delivery service of of Eastern Delights, the Good Time girls.
Cassidy is the super stud here, playing a hero named Peter Galore who, when not screwing every girl in sight, is valiantly trying to save a kidnapped young girl Miss Atwater.