Wallace and Gromit open a bakery, accidentally getting tied up with a murder mystery in the process. But when Wallace falls in love, Gromit is left to solve the case by himself.
Gromit's growing concern over Wallace's over-dependence on his inventions is justified when he invents a “smart gnome” that seems to develop a mind of its own. As events spiral out of control, it falls to Gromit to put aside his qualms and battle sinister forces – or Wallace may never be able to invent again!