Fumie cherished the simple happiness of her ordinary life, quietly living with her husband and son. However, her world is shaken when Takashima, an acquaintance of her husband, suddenly visits, awakening buried memories. Seeing Takashima, who had been living apart due to work, stirs up feelings from the past. Despite trying to resist, Fumie gives in to an affair with him. That night, overwhelmed by guilt, she desperately seeks intimacy with her husband, causing their relationship to rapidly deteriorate. But the consequences of her actions soon spiral far beyond what she ever imagined, leading to devastating repercussions.