When Frowny Fox is thrown into the garage chute, he discovers a whole new group of animals... The Forgotten Critters. They were once normal Smiling Critters before the evil CEO cast them away. Now ...

After Frowny Fox is bullied by the other Smiling Critters, Hoppy Hopscotch tries to protect him. Unfortunately, an accident throws him into the Playtime Co. furnace. Inside, Frowny Fox is corrupted.