Stig is a schoolboy who falls for a woman, Viola, who is 22 years his senior. She is also his teacher. Her husband has a penchant for the odd glass of gin and a wandering eye when it comes to the ladies, so Viola is flattered when she realises that she is the object of desire with Stig. They begin an affair, a move complicated for Stig when the girl next door starts to come on strong to him. With his passion for her faltering, Viola decides to use her position at school for petty and spiteful revenge on her young lover.