Maya and Ilan have an unusual marriage: Maya agrees to tolerate Ilan's chronic infidelity as long as she can participate and he will never stray without her. To her surprise, she finds their threesomes as arousing as they are disturbing and, for a while, everything seems fine. But as Maya's writing career takes off and she becomes more independent, Ilan feels threatened, and opts for another kind of sexual experimentation - one that plays on Maya's fear and ultimately threatens her life.

Meanwhile, Maya is drawn into another relationship with a fateful third character. When her new liaison begins to mirror her marriage to Ilan, Maya discovers that her lover, seemingly a stranger, knows far more about her past than she has revealed.

A compelling chronicle of obsession and power, 3 brings new immediacy to a timeless question: what is the greatest sacrifice you would make for love?