The story takes place in South Korea in 1960. A truck driver was killed because he witnessed the CIA section chief Zhao Baiyan (played by Zheng Baozhi) and his companion Huang Taixie (played by Lee Deok-hwa) illegally obtaining huge amounts of stolen money, leaving three underage children and their mother to depend on each other, including a newborn baby. On the way to escape, the eldest brother Li Chengmo (played by Park Sangmin) was unfortunately separated from his family. A rich man adopted the lonely Li Chengmo. Coincidentally, this rich man was none other than Zhao Baiyan, the murderer of Li Chengmo's father, and they did not know each other's identity. Afterwards, Li Chengmo reunited with his brothers and sisters. It was not until then that he knew the true identity of the man who had always loved him. Morality and family affection were fiercely entangled, and the three brothers and sisters decided to take revenge.