Saori is a wife who lives an ordinary but happy life with her husband and father-in-law. When she was dropping off her brother-in-law, who had been drinking at home as usual, Saori ended up driving the car that her husband usually drives, as he had been drunk. It had been a while since she last drove, and Saori was nervous, so her hands trembled and she unfortunately caused a serious accident. Her brother-in-law suffered serious injuries, including a broken bone, and her husband died. Having caused an irreparable accident, Saori was crushed by guilt and could only find value in life by tormenting herself...