Aya lost her husband in a random murder case. Since then, she raises her son alone and also runs a curry restaurant. She feels she can't be happy again. At that time, Aya meets Ryoji. Ryoji used to be a promising lawyer, but he got involved in the random murder case. He fought against the murderer and killed Aya's husband by accident. Due to the traumatic incident, Ryoji is unable to speak and now drives a truck for a living. Aya and Roji know they can't be together, but they fall deeply in love.

By the time you wake up, they might be gone— 　　For me, “mother” means my grandmother, who raised me with undying affection. This is the story of her meeting and separation from her true love, which she told me for the first time.

By the time you wake up, they might be gone— 　　For me, “mother” means my grandmother, who raised me with undying affection. This is the story of her meeting and separation from her true love, which she told me for the first time.

芥川賞作家・花村萬月原作の同名小説を映画化。実の姉妹の間に生まれた禁じられた感情を、生々しい映像で官能的に描き出す。村上淳、藤田敏八ら個性派俳優の演技も必見！姉・貴子の身体に残るケロイド状の傷を愛おしく感じている妹の愛子。姉もそんな愛子に激しい感情を抱き、ふたりは禁断の愛に溺れていた。しかしある日、貴子が病に倒れ……。