Six months into her marriage, newlywed Yuu begins living with her father-in-law, and an uncontrollable desire starts to awaken within her. Though she knows it's wrong to be attracted to her husband's father, once the flame of lust ignites, she can no longer suppress it. Drawn deeper and deeper into forbidden passion, she loses all sense of self, her body burning with intense arousal. Fierce kisses and sex consume them both, their impulses escalating beyond reason, driving their relationship into an irreversible spiral. Crossing the taboo boundary of incest, they plunge into madness, their fate descending into an unimaginably painful and obsessive obsession.