Grandma Lupe's tamales are the favorite food of all the children in town until Mr. Sugar comes riding in on his magical truck full of sweets. Suddenly the children won't eat anything but double-chocolate sundaes, raspberry cream pie, and fudge bars. Before long they're so roly-poly they can't see their feet, and their teeth are full of black holes! It falls to Grandma Lupe to unmask Mr. Sugar and to show the children why something that feels good...