Wallace has converted his home into a granary complete with fully functional, old-fashioned windmill (patent pending) on the roof, and as a result "Top Bun" has become one of the hottest bakeries in town. But all is not well in the neighborhood, because more than a dozen local bakers have gone missing in the last few months alone. Now, as Wallace falls head over heels for former Bake-O-Lite bread girl Piella Bakewell (voice of CORONATION STREET star Sally Lindsay), Gromit attempts to solve the case of the missing bakers before his hapless master becomes the latest dough-roller to vanish without a trace.