Mary-Kate and Ashely have never been roommates at White Oak -- until now! Mary-Kate can't wait to share a dorm room with her sister. But when Ashley moves in, she takes over the closet, turns out the lights by eight o'clock, and keeps her giant stuffed giraffe in Mary-Kate's bed! Mary-Kate's friends say she won't last one week in the same room with Ashley. But Mary-Kate has a surefire plan to turn her sister into the perfect roommate!