Immortal cultivator Li Changfeng failed to survive the tribulation, and his soul traveled to the late Northern Song Dynasty and possessed a dying boy who was about to be sacrificed by a vampire. He awakened the 'Pure Love God of War' physique - he is naturally restrained against vampires, and the stronger his will to protect his lover, the stronger his fighting power becomes. In order to save his childhood sweetheart Su Wanqing who was kidnapped by a vampire, Li Changfeng joined the Demon Slayer Division, pretending to be a pig and eating the tiger, and counterattacked all the way from his son-in-law who was ridiculed by the whole city. He first killed the vampire baron instantly with the power of pure love, then exposed the conspiracy of the Kingdom of Jin and vampires, and finally crushed the vampire prince under the city of Bianjing with his overwhelming fighting spirit to protect Song Tu and his lover, becoming the number one war god in the Song Dynasty.
