★ 直木賞作家島本理生禁忌之作改編

村主塔子（夏帆 飾）本擁有平凡幸福的婚姻，和事業有成的丈夫（間宮祥太朗飾）及可愛的女兒過著無憂無慮的日子，卻在一次丈夫的聚會中巧遇前男友鞍田秋彥（妻夫木聰 飾），從此平靜的日子起了漣漪。重返職場的塔子與鞍田一起工作，才發現別離沒有讓兩人間的愛情消逝，十年的寂寞讓再次靠近的兩人依偎在一起，但這段禁斷的關係也讓兩人命運邁向無法想像結局。

Toko Suguri (Kaho) is married and they have a lovely daughter. She doesn't have any major problems in her life. One day, Tokyo Suguri meets her ex-lover Akihiko Kurata (Satoshi Tsumabuki) at a friend's wedding. They haven't seen each other in 10 years. Toko Suguri indulges in a sexual relationship with Akihiko Kurata.