Every night, Izumi endures the humiliating and lewd torments inflicted by her husband. Her self-righteous, domineering husband treats her son, Hiroshige, with equal harshness. Trapped in this broken household, Izumi succumbs to her carnal desires, desperately trying to forget her past. Yet, her sealed memories and the dark secrets surrounding Hiroshige's birth gradually come to light. As the family collapses around her, Izumi can do nothing but stand frozen in despair. In the darkness of the storage room, mother and son, driven by cursed blood, give in to forbidden carnal union.