Drunk and impulsive, Hitomi suddenly kisses her husband's older brother, sparking a secret affair within their shared home. But fearing discovery by her husband, Hitomi decides she wants to end the relationship. When she confides in her brother-in-law, he reveals he has been secretly recording their encounters and uses the footage to force her into continuing the affair. The story unfolds as tension and conflict grow between them, questioning what lies ahead for the two.