In this world, hordes of undead creatures are relentlessly preying on humans. Despite the unceasing efforts of numerous magicians to combat them over millions of years, they have always been vanquished in the end. However, a glimmer of hope appeared with the advent of the 'San Zhen' Clan, consisting of three successors from different eras who are fighting against the undead. They represent humanity's final opportunity to emerge victorious in the ongoing battle between the living and the dead.