Jane Sinclair doesn't fit in with anyone in school, has no friends and is sworn enemies with Jennifer Stone, the high school hottie. When a traffic accident sends Jennifer into Jane's body, the two of them find out more about each other than they want to know. To make matters worse, Jennifer begins to learn how to take over Jane's body -- and Jennifer's body is weakening to the point where death is imminent. Unless the two of them find a way to work together, Jennifer's body will die -- and Jane will be permanently kicked out of hers.