The Ice Ghoul returns to Lakewood even more powerful than before. Hayley, Jake and Kirby must fight the creature before they themselves are infected and turned into ice zombies.
After blowing up the science fair Etienne begins to act like a tough guy when he hangs around Cadence. Jake has to walk around with a Doom Hound disguised as a yappy dog.
A Flying Swamp Monster that feeds on electrical energy has come to Lakewood and is not only terrorizing the city but is also threatening Prom from happening.
Kirby's lifelong nemesis and ex Troop mate, Morgan Grey, uses her access to monsters in helping her finally defeat Kirby at the National Young Inventors Expo. When she loses control of her creation, it sets out to destroy her, the Troop & Lakewood High.
A monster switches places with Hayley and finds out it's easier to be a monster than a teenage girl. Kirby's new combat trainer, "The Hammer," beats Kirby down until Kirby can stand up for himself.