Mari's former boyfriend Yoshio has committed suicide. Mari grows suspicious when she learns of his engagement to a woman he met on a matchmaking site.
Megumi is arrested for marriage fraud and murder. Mari harbors doubts and delves into Megumi's past along with a sports journalist named Kengo.
Mari and Kengo travel to the island where Megumi grew up. They hear that she was once the prettiest girl there, but something changed her.
New secrets surrounding Megumi come to light as Mari returns from the island to meet her face to face. Mari's father suddenly collapses.