Middle aged father and husband Mark is stuck in an unhappy marriage with increasingly bitter wife, Magdalene. Their only bond is beautiful blonde daughter Heather, who has invited longtime friend Lily to stay with them for a summer visit. Fresh from an afternoon tryst with his young secretary, Mark comes home to find that Lily has grown into a beautiful, sexy young woman. When he discovers Lily and Heather secretly engaging in lesbian sex one night, the father's lust for his daughter's young friend becomes unbearable. Will the older man risk everything to satisfy his desire for the beautiful girl?