Michiko Nagano

When the only son of a working class woman is fatally struck by a car driven by the adulterous wife of a company president in a hit-and-run, the victim's mother changes her identity and infiltrates the couple's home to work as their maid, plotting to murder their similarly-aged son.

Tashiro coincidentally meets his best friend Sugimoto in a bar very close to the apartment in which Sugimoto’s wayward wife is found dead. Although Tashiro is not a suspect in the police investigation, he is racked with guilt and confesses to his wife, Masako. In an effort to further relieve his tortured sense of guilt, he then confesses to Sugimoto. Neither his wife nor his friend can believe that he could have been involved.