A divorced man falls in love and then marries a divorced woman in the first third of the film. The man, Danny, has one son, Les, and the woman, Cathy, has two daughters. However, the two sets of kids haven't ever seen each other. So when everybody meets at the dinner table, Dan discovers he has had an affair with Cathy's older daughter.

Due to her split personality, a single mother tries seducing her son. Though he is panicked at first, his lust eventually causes him to surprise her in her sleep. Meanwhile, the mother's cheated psychologist is seduced by his daughter.

The story of seduction continues from the Scott family to the McBride’s, where mother and son, brother and sister, father and daughter enter the perverse world of incestuous pleasures.