The protagonist Xiao Ye was originally a jailer at the bottom of Tianyao Prison. He was framed for discovering his boss's secret and was sent to death row. In a desperate situation, he accidentally fused the forbidden item "Wolf God's Fang" hidden in prison, and then gained the terrifying power to transform into the ancient wolf god on a full moon night and tear apart his enemies with his own hands. The plot begins with the protagonist's revenge. By continuously devouring the essence and blood of powerful enemies and unlocking the bloodline of the wolf god, he transforms from a mortal into a peerless fierce god who can control the body of a wolf and howl at the moon and swallow the sun. The highlight is the extreme contrast and tension brought about by the protagonist's dual identity of "a human by day and a wolf by night", as well as the bloody, violent, and powerful battle scenes in the wolf form. He kills decisively along the way, pushing all enemies aside, and finally reveals the eternal secrets hidden behind the bloodline of the wolf god and the world, and climbs to the top of the food chain.