Jiang Xiaoyu, who calls himself "the most evil in the world", has lived in the Valley of Evil since he was a child. Under the care of Li Dazui and others, he is good at playing pranks and is slick-tongued, but he is kind-hearted, innocent and cute. Xiaoyu travels around the world and meets the heroic Hua Wuque. As they get to know each other, Xiaoyu and Hua Wuque become a pair of friends who are both enemies and friends. It turns out that Hua Wuque was adopted by Yaoyue, the owner of Yihua Palace, and taught him martial arts since he was a child. In order to avenge Jiang Feng, the biological father of Hua Wuque and Xiaoyu, the owner deliberately separated the two and raised them so that they would kill each other when they grew up. At the same time, Jiang Biehe and Jiang Yulang, father and son, are planning a bigger conspiracy in the martial arts world. The mantis stalks the cicada, but the oriole is behind. A bloody storm concerning the survival of the martial arts world is about to unfold. Xiaoyu and Hua Wuque finally see through the conspiracy and tricks of the palace owner and work together to quell the grievances and challenges in the martial arts world.