In this episode, an ominous cloud begins to settle on Percy's household as both he and his mother experience bizarre nightmares of a perversely sexual nature. This does not stop our hero on Monday, though,... from taking a trip to the middle of nowhere with Judy, guided by the mysterious info downloaded from his Dad's computer. Finding themselves temporarily stranded in a remote worn-down shack, Percy and Judy take the opportunity to get even closer to each other, with Percy paying his young teacher back with an easy lesson of sexual education... but this lewd idyll comes to an end when they discover the secret entrance to what is, apparently, the sanctuary of the Sons of Astaroth, from which the two narrowly escape with their lives after almost running into the mysterious "Astaroth" in person. At least all this tension can be alleviated back at home, when elder sister Lauren rewards her brother's truthfulness by inviting him to go skinny dipping in her favorite pool...