A mystery melo who depicts the story of a dangerous woman who may be a serial killer, and a man who falls in love while tracking her.

After his last tour, Aurélien decides to settle in Japan with his wife Nanako, pregnant with their first child. In their new house in the Japanese countryside, Aurélien discovers an old armor that awakens strange creatures, the Yokaïs.

Follows an investigation that dives deep into the murder of a wealthy woman and all the dark secrets uncovered about her life.