Lin Jian, whose body is part mechanical, and the mysterious youth Bu Xizhan, meet on a snowy night in a small mountain village. After witnessing the cruel oppression of the villagers and the destruction of the village, the two embark together on a journey to find the culprit. However, the two of them don't get along very well at all. One of them is a straightforward and heroic champion of justice, while the other is a mysterious and secretive schemer who tries to avoid fighting as much as possible. Their journey together is seemingly endless, but what awaits them at the end is either hell, or salvation.