Malcolm is a young, trainee teacher, on his first assigment he interns at a girls high school. He is surprised to discover that he is the exact clone of a seventeen year old pupil, the daughter of wealthy parents. When the girl goes missing, everything seems to depend on the girl being present for a range of deals that are necessary to prevent both the school and the parents company from going into bankruptcy. They pressure him to take her place and become the pretty Megan Gregson. His reluctant one week charade becomes increasingly permanent as he is drawn more and more into the life of a schoolgirl and the plans her parents had for their beautiful daughter.