Tetsuo Tosu, an ordinary office worker, uncovers a harsh truth: his daughter Reika is a victim of physical abuse at the hands of her boyfriend, Matori Nobuto. Digging deeper, Tetsuo discovers that Nobuto is involved in a criminal organization that has been extorting money from Reika's wealthy grandparents. To make matters worse, Nobuto has a dark past of murdering his ex-girlfriends. Fearful for his daughter's safety, Tetsuo takes matters into his own hands and enlists the help of his spouse, Kasen, to eliminate Nobuto. They dispose of the body and work to protect their daughter from the ongoing threat of the crime syndicate, who begin to suspect Nobuto's disappearance. Tetsuo and Kasen work tirelessly to keep Reika safe from harm and steer her out of trouble.