Ayako is a housewife who spends her days nursing her father-in-law and taking care of her husband, bumps into her former lover Keisuke, who is now married and has became a cleaner. When Ayako was a junior high school student fourteen years ago, she was involved in a forbidden love affair with Keisuke who had been a teacher at the time.

某日，高中老師鵜川接到一通電話，自稱稻村的律師想詢問他關於六年前的一樁謀殺案，兇手是他當時的女友－遠澤芽衣。 時至今日，回想起當初那場刻骨銘心，卻又讓所有人陷入悲劇的炙情熱愛，鵜川彷彿再次體驗那場甜美又心痛的戀愛。然而稻村拿出一張照片，讓鵜川終於說出當年被刻意隱藏的黑暗秘密。