The life of an American woman living in Kyoto, Japan, is upended when her husband and son disappear in a mysterious plane crash. As consolation, she's given Sunny, one of a new class of domestic robots made by her husband's electronics company.

Family duty sends a lawman to London to look for his mob-assassin brother as a yakuza war threatens to engulf Tokyo. Trust is even tougher to find.

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.