When Robert accidentally destroys four months work, he has to find another job. His disastrous venture into betting leaves him at the mercy of a vicous moneylender and the only way to avoid being crippled for non-payment of his debt means that he has to live in disguise. He is persuaded to take his 16 year old sister's place at a local high school, where he is drawn further and further into femininity, encouraged by his wife and sister who are conducting a lesbian affair. The innocent looking schoolgirl further descends into murder and mayhem as they follow a path that leads them to a shattering discovery about their own sexuality.