Part 3/8:
During the museum visit, Percy's mother, Sally, conveys a warning, urging him to prepare for an approaching storm without specifying the nature of the impending danger. This foreboding message becomes all too real when the seemingly harmless school trip takes a terrifying turn as Percy faces off against a monster, led by his math teacher who transforms into a winged creature. In a frantic bid for survival, Percy wields a magical pen that transforms into a sword. Despite suffering a major blow, he proves resourceful and manages to fend off the threat.