Shawn and Gus are on the slopes on their ski vacation in Whistler, British Columbia when Shawn spots wanted international art thief Pierre Despereaux. Despereaux is so good, he's never left enough evidence behind to be formally accused and so promptly gives Shawn and Gus the slip. Shawn goes to the Mounties for help, who need very little convincing of his psychic abilities. Deputy Commissioner Dykstra calls Lassiter to ask for Despereaux's files to be sent up, and Lassiter insists on being part of the investigation. Lassiter and Juliet arrive in Canada just in time to meet Shawn and Gus at Despereaux's latest crime scene. The thief has stolen an antique necklace worth several million dollars.