It's Halloween today. Molang is dressed up as a mummy. Piu Piu has spent a lot of time carving a huge pumpkin to decorate the garden. There's no time to lose. As someone knocks at the door, Piu Piu gives the pumpkin to its mummy-disguised friend and runs to dress up... and finds itself face to face with Molang. But who has the precious pumpkin? And how can they get it back?