In the 120th year of the Great Xia calendar, all the members of the Zhenbei Prince's Palace were killed in the battle at Yanmen Pass. Only the sick and weak ninth son, Xiao Chen, survived. The soul of the modern special forces king "King of Hell" penetrates his body. At the beginning, he encounters a desperate situation where the imperial power seizes the troops and the old grandmother orders him to "carry nine houses on one shoulder". Everyone laughs at him for being a loser, but they don't know that the King of Hell has arrived. Xiao Chen will hold the sword to protect the Xiao family, control the Northern Army, kill traitors and guard the northern border, so that the world will know that the Xiao family cannot be bullied!
