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.

An account of the life and work of legendary Japanese actor Toshirō Mifune (1920-97), the most prominent actor of the Golden Age of Japanese cinema.