All things possess a spirit. Gather spiritual energy, and wisdom is born; with wisdom, one takes form; driven by desire, one becomes a demon.
What is a demon, and what is a human?
A boy raised in a brothel sees his peaceful life shattered again and again in the wake of a Zhu Yan disaster. First he is separated from the one he loves, then his thirteen adoptive mothers are murdered. And so the boy sets out on a path of revenge. After taking a master, he kills Tuliu, cuts down bandits, encounters Ping Shou, and then faces the legendary Taotie, a fearsome demon said to embody greed and gluttony...
With his sword, he sees the seven emotions and six desires, cuts through the line between good and evil, and seeks to understand the difference between humans and demons. But what began as an ordinary quest for revenge turns out to have drawn him into a vast conspiracy...
