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.
Motorcycle racer Mica and her mechanic boyfriend Migo sign on with a motor shop's racing team, where they must handle challenging new dynamics that test their skills and relationship to the breaking point.