After her divorce, Seiko raised her son Haruhiko all by herself. One day, she is suddenly fired from the company where she had worked for years, leaving her shocked and unable to recover. During this difficult time, she notices something strange about Haruhiko and confronts him. Realizing she can't afford to wallow in despair when her beloved son needs her, she decides to visit her former boss, Sugaura, for help. Though battered by life's harsh realities, she finally secures a job offer—but the working conditions at the new company turn out to be far more abusive than she ever imagined.