Lu Kongwen is the author of a fantasy novel series following a heroic teenager, also named Kongwen, on a quest to end the tyrannical rule of Lord Redmane, under the guidance of a Black Armor. But through a strange twist of fate, the fantasy world of the novel begins to impact life in the real world, leading Guan Ning to accept a mission from Tu Ling to kill the author.

The whole town is waiting for the "flood dragon" to transform into a true dragon, yet no one realizes someone is waiting for a sacrifice! Rain pours relentlessly for seven days, and strange deaths occur one after another… Taoist Zhang Buping arrives in Longkou Town and discovers that every victim bears an ominous "Fallen Dragon Claw" mark. Is this the fulfillment of a thousand-year-old legend, or the perfect crime of killing in the name of a god?