Jasper is thrilled when he finds his dadÕs favorite childhood toy, Marcel Mouse, at his grandmotherÕs place. HeÕs so afraid to lose the family treasure that he keeps Marcel on a string around his neck. But sometimes Jasper has to take off the little plastic mouse, and that leads to all sorts of trouble. First, Marcel goes missing from under JasperÕs pillow, then he gets sent to the principalÕs office and disappears again! Then one day, something TERRIBLE happens, and it seems Marcel might be lost forever É Will Jasper ever see Marcel Mouse again?