It's Halloween night at the Bowl-o-Rama where Samantha and her friends have a party. Everybody's having a fantastic time... before the Chubbies arrive. From Snerd's remote planet, where sex has been outlawed, come the chubbies. A race of gruesome, and sexy little monsters, hellbent on world wide domination by invading the human system via any orifice they are able to find. The celebration expires and the terror comes into the world when the Chubbies hold captive the teens and must fight to maintain their butt holes tight inside this action.