mother in law

Keiko (Machimura), who lost her husband due to death, ends up marrying Masahiko due to a connection. They were a close couple that everyone envied, but their son Shunichi, who was raised by Masahiko alone, does not find Keiko's existence interesting. One day, Koike, an insurance agent who took care of Keiko after her husband passed away, appears in front of Keiko. Koike rushes into the couple's love nest and forcibly plays with Keiko's body as if to destroy their happiness. And Shunichi happens to see it... A chain of misfortune begins.