During the holidays, protagonist Mo Bai, his older brother Mo Fan, and their childhood friend Luo Han were attacked by a bestial corpse that had suddenly broken into their house. When Mo Bai woke up, he discovered that he was a bestial corpse, while Mo Fan was rescued by hunters. In order to find his younger brother again, Mo Fan gradually became the strongest hunter in the organization, while the appearance of the S-Rank Mo Bai instilled fear into the people. When the brothers meet once again, they are completely different people, meaning conflict can happen at any time.