The gang shows up at a book signing for their favorite mystery author Agoata Christie. Suddenly the lights go out and screams fill the air. When everything returns to normal, it’s discovered that Agoata has vanished. Taking a cue from the pages of his (least) favorite book, Pepe dons his Sherlock hat and decides to investigate. More anxious to play detective than actually do any sleuthing, he misses the most obvious suspect of all, the mysterious stranger known as Chupa Cabra.