Lizzie and her brother Matt take sibling rivalry to the extreme when they have the ultimate outer-body experience--Matt becomes Lizzie and Lizzie becomes Matt! Can they fool the school and figure out a way to change back before they are discovered? And if switching bodies was bad, sharing a room is even worse! When a water pipe bursts in their home, Lizzie and Matt are forced to share a room. Will the ultimate odd couple ever learn to live together?