Who Is the Sword in the Cold Rivers and Lakes?

Nearly half of the masters in the martial arts world disappeared at the same time on Bailong Island, and their lives and deaths were unknown. At the same time, a powerful mysterious force suddenly appeared in the world. At the same time, the four major sects of Jianghu and other large and small sects and scattered people in Jianghu were massacred. Suddenly, everyone was in danger, blood flowed into rivers, and the world was in chaos. The mysterious force even issued the order "Those who obey will prosper, and those who go against will perish." Ten years later, the former children have grown up, and they join forces with the remaining Jianghu forces to investigate the mysterious forces and the truth behind the disappearance. Fight against the mysterious forces with all your strength.