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.
Inspired by a true story, the action-comedy follows a wild man state cop (Scott) who shows up in a small town with a big meth problem and immediately butts heads with a strait-laced local deputy (Simmons) as they attempt to solve a murder.