Lin An, a survivor of the Lin family's annihilation, was admitted to Qinglong Academy with the seal of the black dragon's bloodline. During the entrance trial, due to the riot of creatures in the dark zone, he accidentally awakened dual powers - the golden light in his left eye was the Lin family's Xuan Bingjin, and the blood and tears in his right eye induced the black dragon's flames. With the revelation of Lin's ice core in Frostwing Centipede's body and the technical number from twenty years ago, he is gradually involved in the triple puzzle of the family's annihilation, the operator of the crack in the dark zone, and the seal of the ancient beast. In cooperation with the mechanical genius Chu Xiao and the swordsman Su Jiuli, he explores the method of merging the two forces, reveals the truth of the year, and prevents a greater crisis.
