My grandfather died mysteriously deep in Suolong Mountain. His body was covered with gnawing marks, but he was holding half a bronze piece engraved with a dragon in his palm. Lin Mo, a graduate student in the Department of History, returned to her hometown to investigate, but she discovered that seven people had disappeared in the mountain village for half a year and that the construction team cried every night. These "bone dragon legends", which she regarded as superstitious, were approaching step by step.
Going into the mountains with Orion Laojiu, strange things happened one after another: the turning guidepost led to the abyss, and the scarecrow wearing an old school uniform laughed at night. Grandfather's diary reveals the taboo: Suolong Mountain is a rift in the three realms, holding down the "bone dragon" made up of millions of bones and resentments. The nine soul-suppressing locks are the only shackles, and she is the last "key" of the mountain guardian family.
There is a conspiracy hidden in the "academic investigation" of the tutor Professor Chen. The ghost of the mountain guard is both good and evil. When the ninth chain cracked on the top of the mountain, and bone claws protruded from the pile of bones, Lin Mo understood: to suppress this "dragon", what is needed is not a seal, but the use of blood to transcend the evil of the human heart.
The nine locks are about to be broken, and the dragon's shadow gradually appears. Her blood is both a chain and a soul-crossing lamp.