Zhang Liuqian was born in a border mountain village in the Central Plains. When he was nine years old, his father rescued Yang Shao, a disciple of the Demon Cult. His family was wiped out. He was kidnapped into the Black Demon Cult's "Panlong Cave" and became Killer No. 50. With the best foundation in the world, he came out of seclusion four years ago and transformed into a "black killer" to sweep through the martial arts world. On the day he came out of seclusion at the age of eighteen, he killed his enemy Yang Shao and then unified the world for the Black Demon Sect. However, due to a surprise attack by the White Alliance, the sect destroyed his brothers. In despair, the maid Su Xiang rescued him from the ruins, and the two rebuilt the "Fuxing Inn". Twelve years later, Kangqing Town became prosperous again, and Zhang Liuqian lived in seclusion as the president of the merchant association. In order to fulfill his brother's last wish and pursue the "Martial Ultimate" realm, he decided to participate in the Heroes Conference. On the way, he encountered the beast king Pan Ji for revenge and was involved in the conspiracy of the Datong sect. The god of death who once made the martial arts fearful returned to the world.
