In the beast-taming world where exotic beasts run rampant, beast grades are divided into ordinary, excellent, rare, epic, legendary, immortal, mythological, and primordial. The male protagonist is reborn and awakens the beast-taming system, with opportunities descending continuously. Coincidentally, the Dragon Country's once-in-a-decade Imperial City Beast Fighting Competition opens, beast tamers from one hundred and eight cities gather, and the primeval forest secret realm trial officially begins. Inside the secret realm, dinosaur-like exotic beasts are widespread, and murderous intentions lurk everywhere. Wandering the secret realm alone, the male protagonist makes friends with talented powerhouses along the way, while successively encountering schemes and encirclements by major forces. Relying on the foresight of his past-life rebirth, he nurtures powerful exotic beasts such as the Qilin, breaking through barriers and clearing obstacles all the way, launching an attack towards the peak of the competition.