Hana invents a machine that can shrink anything. Hana strictly tells Tayo not to touch the machine, but Tayo, who is full of curiosity, touches the machine anyway and gets hit by a mysterious ray. The ray shrinks him into a tiny toy bus. Just then, Rookie and his niece, Jinnie, visit the garage. Jinnie, who's been carrying around a toy bus, thinks that Tayo is her toy bus and takes him home with her.