Set after after drama series "Caution, Hazardous Wife," with Yuki Isayama (Hidetoshi Nishijima) pointing a pistol at Nami Isayama (Haruka Ayase) after she came home. Nami Isayama was a special agent, but she hid her past and married Yuki Isayama. Her husband Yuki Isayama pretended to be an ordinary office worker in an IT company, but he was really an agent for the public security department.