A story of friendship between a young convict who is forced to work in a retirement home and a group of crazy old people. Together they organize their escape.
After a gruelling final tour, Aurélien decides to settle in Japan with his wife Nanako, who is pregnant with their first child. As the young couple move into a traditional house in the Japanese countryside, Aurélien discovers an ancient suit of armour in a well, which is about to awaken strange creatures known as Yokaïs.
