A strange monster is inhabiting Carl's pool, and the Aqua Teens attempt to get to the bottom of the mystery. It turns out to be a mermaid, who has sex with Carl, Frylock, and Meatwad, who all explode as a result of being impregnated by the mermaid. Master Shake, meanwhile, does not explode, despite describing his supposed sexual encounter with the mermaid to no one, as they have exploded.

Special Guests Vincent Pastore provides the voice of Terry (uncredited) and Dana Swanson as the She Creature