Peng Yunhui, the third young master of the Peng family in the north of the Yangtze River, was ridiculed as a "bull-headed young man" because of his slowness and clumsiness. He failed miserably in a competition with his disciples and almost died. After waking up, there was an extra soul in his body - the memory and experience of his previous life as the world's number one killer, "King of Killer" Ji Kui.
Ji Kui once ranked among the top ten warriors in the world with his fast sword, but he was defeated by the sword of the world's number one Jin Daxiong because the sword was "weightless". After resurrecting his life, he decided not to be a cold-blooded killer, but to become an upright warrior. After possessing Peng Yunhui, he discovered that this body wrapped in fat actually concealed excellent martial bones, and accumulated a large amount of undigested spiritual energy in his body.
Relying on the vision and ruthlessness of the top killer in his previous life, Peng Yunhui began to practice crazily. He integrated the killer's "kuai" technique into the basic sword technique of the Peng family in Jiangbei, the "horse-cutting sword technique", and developed a fast knife that amazes the world; he also created the original "affectionate heart knot" internal skill and mental technique to resolve the murderous nature of martial arts in his previous life. In just two months, he transformed from a second-rate waste to a top master. He challenged Peng Qian, the collateral genius who once defeated him, and became famous in one battle. He was awarded the title of "Master of the Quick Sword".