The motel has a special room designed for sexual activities. It also has a habit of photographing sex act engines and extorting the parties concerned. One day a mysterious killer with black gloves up and the situation is changing.
A man tries to uncover an unconventional psychologist's therapy techniques on his institutionalized wife, while a series of brutal attacks committed by a brood of mutant children coincides with the husband's investigation.
After a successful robbery leaves famed thief Lupin III and his partner Jigen with nothing but a large amount of fake money, the so called "Goat Bills", he decides to track down the counterfeiter responsible - and steal any other treasures he may find in the Castle of Cagliostro, including the 'damsel in distress' he finds imprisoned there.