Crown Prince Wu Luan is in love with Little Wan but left heartbroken when she marries his father, the emperor. The emperor's brother, Li, kills him and Wu Luan tries to avenge his father's death.

Chinese film directed by Gang Xia.

In the late years of the Sui Dynasty, chaos reigned across the land. On the tenth day of the third month of the fourteenth year of Daye, a mutiny broke out in Jiangdu, Emperor Yang was killed, and the divine beast Kui Ox was left ownerless. Rebel forces from all directions and local powers mobilized to Jiangdu in search of the legendary divine sword that could subdue the Kui Ox. A scholar journeyed to Jiangdu for the imperial examination and, by twist of fate, arrived at the mysterious Caohang Ferry Inn. Within the small inn, there were aspiring scholars like him who possessed ambitions but were scattered across the world, as well as a delicate and enigmatic mute woman, and seemingly unreliable free-spirited martial artists.

The film's story takes place in Huilonggang, a small town in the late Republic of China. This secluded place appears to be a paradise, but in reality, it hides a chilling mystery. In particular, the patriarchs of the town's four largest families have tragically died one after another. As people's investigation deepens, all evidence points to a terrifying castle on the edge of town. The castle's guardian will bring more bloody, bizarre and suffocating strange things to the place...