Wallace and his dog Gromit have a new business - a bakery. When Wallace meets Piella Bakewell, the Bake-o-lite girl, he quickly falls in love. But Gromit discovers a terrible, dark secret. Has Piella already killed twelve bakers? And is Wallace going to be the thirteenth? "Gromit isn't going to stop me!" says Piella angrily. The brave dog has to work fast to save his friend.