Those who die violent deaths lose their memories. The authorities will not accept them, and in time they become wandering spirits. In the early Han dynasty, wandering spirits ran rampant, throwing the mortal world into chaos. To end the disorder, the king summoned brave men to capture souls and destroy spirits. But this only made things worse, sparking a war between Yin and Yang. The dead became spirits, flowing on like a mighty river that could not be stopped. At that time, a group arose among the people. Rather than destroy the spirits, they helped them recover their lost memories and escorted them to the authorities. After years of struggle, the war between Yin and Yang was brought to an end, and the people could live in peace. Everyone called them ferrymen!