A wife and mother known for her skills as a cupcake baker is elected to the office of mayor for her small town.

Wallace and his dog, Gromit, open a bakery and get tied up with a murder mystery. But when Wallace falls in love, Gromit is left to solve the case and save Wallace from a madwoman killing bakers.

Cookie-baking sleuth Hannah Swenson and Detective Mike Kingston investigate after a man is murdered in his office; Hannah must protect herself when a rival store owner is found shot to death; Hannah's brother-in-law Bill is accused when the town's sheriff is murdered.