Policeman Abel (Jean Reno) has always been brave and resolute. He treats prisoners with almost cruel methods and never shows mercy. However, the tough guy hides a long-forgotten emotional injury in his heart. 19 years ago, his Japanese girlfriend Miko left without saying goodbye. Abel missed his girlfriend for 19 years without any change of heart. One day, the news of Miko's death came, and Abel became the heir to his lover's entire estate. The only requirement of the will was to take care of his daughter Yumei until adulthood. Before Abel recovered from the shock, a noisy, weirdly dressed and rude "little girl" jumped out in front of him. She was Yumei (Ryoko Hirosue). Abel accidentally discovered that there was something strange about Miko's death, and Yumei had a huge deposit of 200 million US dollars in her bank account. Yumei was also secretly stalked by the underworld. Abel began to explore the truth amid many doubts.