Private Eye Bernard Bingbang is hired by old lady Agatha Bungworthy to find her runaway niece Cynthia, heir to the family fortune, before that fortune goes to nasty Uncle Philip. Bingbang’s only clue to the niece’s identity: she has a birthmark that looks like a butterfly right above her left nipple. Naturally, in true Nudie-Cutie fashion, “The Case of the Hidden Butterfly Birthmark” means our hero will have to see numerous naked breasts in order to find the missing heiress.

Two mob money couriers, Frankie and Tony, have their latest package of $1 million stolen by two con women, Dana and Marcia, in which the men must find the women to recover the money before they become marked men.

The Wolfman, Dracula and Frankenstein spy on a girls’ school in the mountains, where most of the girls spend their time sunbathing in the nude, nude exercises and nude art classes. The monsters finally invade the school.