Wallace and Gromit's new window washing business brings them to the door of Wendolene Ramsbottom, who owns the local wool store. It isn't long before Wallace is smitten but Gromit feels there's a dark secret lurking behind all the cheery, brightly coloured yarn. Upon returning home, Wallace and Gromit discover a cute little lamb which has been eating up everything in their apartment. The lamb is dubbed "Shawn" and Gromit wonders if the ravenous little creature is connected with the recent sheep-knappings but his snooping gets him framed for the crime... Is sweet Wendolene involved in a dastardly plot to keep herself in wool or are there more sinister forces at work?