Hei Xiazi, the once all-powerful kickboxing master, completely washed his hands of his adopted daughter Ning Ning and turned into a full-time nanny in order to raise his adopted daughter Ning Ning who has the mysterious "bloodline of the King of Hell". The sudden appearance of their old partner and ambiguous object Jie Yuchen broke their peaceful life. In order to completely solve the crisis caused by his daughter's bloodline, Heixiazi had to join forces with Jie Yuchen to explore the mysterious ancient tomb again. In the process, the two people's deeply buried emotions resurfaced, and were closely intertwined with a thousand-year conspiracy surrounding the "bloodline of the King of Hell." They must find a balance between protecting their children, dealing with all forces, and clarifying their relationship with each other.
