A modern young man accidentally transmigrates into the Great Wilderness Realm, a martial world centered on making contracts with, commanding, and fusing with the strange beasts of the Classic of Mountains and Seas. Here, martial cultivation is inseparable from the power of strange beasts, and every powerful martial artist is also a powerful beastmaster. Armed with his foreknowledge of the Classic of Mountains and Seas and his modern scientific mindset, especially in battle strategy, analyzing the habits of strange beasts, and using energy, the protagonist rises from obscurity in this dog-eat-dog world teeming with strange beasts and forges a martial legend of his own.