Akira works as a lawyer. One day, he meets with Rie who was his client. She asks Akira to perform a background check on her late husband Daisuke. After Rie got a divorce, she raised her child alone and returned to her hometown. There, she met Daisuke and married him. She enjoyed a happy family life with Daisuke and their 2 children. Suddenly, Daisuke died in an accident. While she was grieving, Daisuke’s older brother Kyoichi visited his funeral. The two brothers had been estranged for many years. When Kyoichi saw Daisuke's picture, he stated that the person in the picture was not his brother. Adapted from the novel "A Man" (ある男) by Hirano Keiichiro (平野啓一郎).