There were babies kidnapped by Japanese fathers and naturalized Chinese mothers.Arikino (played by Ryuhei Matsuda) serves as his mother's translator and gradually approaches the mysterious incident.

On the other hand, Hongtian (played by Nao) went undercover to arrest a criminal who stole something from a drugstore, and met Wang Jingbin (played by Zhang Han), a Chinese man in Japan who was raising a baby.Hongtian understands Wang's hard work in raising children and wants to help Wang.But in fact, there was an abducted baby in the apartment room where Wang lived with another woman...