While a mysterious extra-terrestrial Inquisitor evaluates human culture, Dr. Venture discovers an old video recording from his father informing him he must, before tomorrow night, locate and assemble the hidden pieces to a device that will save the Earth from certain doom.

Baron Underbheit returns as the Venture Bros jet crashes in Underland. The Baron seeks revenge on Dr. Venture and attempts to marry Dean, who is dressed in a Princess Leia slave girl costume when they are captured.