World mixed martial arts champion Lu Wushuang single handedly defeated numerous insider fighting leagues, and was hated by various families. He went into hiding and worked as a cleaner in a boxing gym under the pseudonym Liu Shengnan. A video of Liu Shengnan helping out during a kick-off incident went viral and was discovered by the Tang family of the fighting alliance, who sent people to chase after him. Kidnapping family members and threatening Liu Shengnan to take action, he was scolded by Liu Shengnan. The Tang family still refused to give up and kidnapped their daughter. Liu Shengnan rescued her with multiple enemies, but she fainted due to exhaustion. At a critical moment, the husband of Liu Shengnan, a descendant of ancient martial arts, Xiao Changlin, intervened and warned everyone to save his wife and daughter. New and old grudges, the various aristocratic families behind the Tang Family United Fighting Alliance want to kill Liu Shengnan, and Xiao Changlin returns to the martial arts world to protect his family. The champion of mixed martial arts, Liu Shengnan, and the inheritor of ancient martial arts, Xiao Changlin, are no longer backing down as the two proud couples take action to uncover the ugly secrets behind the martial arts family