Bai Lou, a cat demon who had spent years observing humans while living with an elderly scholar on Blue Star, is unexpectedly transmigrated to the Beastman Continent during his tribulation for human transformation. Struck by lightning and knocked unconscious, he awakens in the Forest of Ten Thousand Beasts, inhabiting the tiny body of a white cat. The environment is perilous, filled with colossal predators like wind dinosaurs and giant wolves. After narrowly escaping a confrontation, Bai Lou is discovered by Lang Zhan, the leader of the Wolf Tribe, who is returning from a dangerous hunt. Recognizing the cat's weakness and inability to survive alone, Lang Zhan takes him back to the tribe.
Upon arriving at the Wolf Tribe, Bai Lou learns about the society's structure, where beastmen can shift between human and beast forms, while females possess only ears and tails. The tribe is led by Lang Zhan, a powerful and cold warrior who is injured from his hunt. Bai Lou, unable to speak human language in his beast form, communicates through meows and gestures. The tribe's priest, a fox beastman who married into the wolf tribe, examines Bai Lou and determines he is an adult beastman, not a cub. Since Bai Lou cannot return to his original world immediately, Lang Zhan allows him to stay in the tribe on the condition that he supports himself.
Bai Lou discovers he has inherited a Multiverse Mall space from a previous host. The system provides a beginner's guide, explaining that he can earn Realm Coins by selling items from his world or buying goods to sell. His initial goal becomes survival and accumulating resources to potentially return home. He transforms into his human form, revealing a strikingly beautiful appearance with long white hair and icy blue eyes, which surprises Lang Zhan. Bai Lou begins to adapt to his new life, using his knowledge of cooking and seasoning to improve the tribe's diet. He washes the gamey blood from the dinosaur meat and introduces sea salt, greatly enhancing the flavor. This act of care earns him a measure of trust and affection from Lang Zhan, who begins to view him as more than just a stray animal.
As Bai Lou integrates into the tribe, he forms a bond with Lang Tu, a young wolf cub who looks up to him. He also starts exploring the surrounding forests with Lang Zhan to gather wild vegetables and fruits, using his system detector to identify valuable items. During one outing, he finds lemon trees and plans to cultivate them in his mall space. The story highlights Bai Lou's gradual shift from a vulnerable outsider to a valued member of the household, relying on his unique skills and the support of Lang Zhan while navigating the dangers and social dynamics of the Beastman Continent.
