Marvin lives with his family under the kitchen sink in the Pompadays' apartment. He is very much a beetle. James lives with his family in New York City. He is very much an eleven year-old boy. After James gets a pen and ink set for his birthday, Marvin surprises him by creating an elaborate miniature drawing. Then James ends up with all the credit, and is expected to do it again. Before they know it, the unlikely friends are caught up in an art heist that could lead them to a long-lost drawing by Albrecht Durer. Of course, James can't go through with the plan without Marvin's help. But can a boy take a beetle to a museum and let him recreate a master work of art without anyone knowing about it? Even more important, can he bring the beetle safely back home?