Mo Chen is a child without parents. The ordinary rural life makes the little Mo Chen and his grandfather depend on each other. Due to his lonely personality, Mo Chen only had one friend: the big yellow dog in the yard. Every time he was bullied at school, he would only talk to him while holding the big yellow dog, as if only the dog could understand his grievances. On the day when he left the village to go to junior high school in the county town, Li Changjing, the villain who had been bullying him, suddenly became very kind to him and wanted to be his brother. In this way, the little Mo Chen accepted Li Changjing's care in worry, and later gradually turned into dependence. But then Xiao Han, a demon-like person, appeared. Under Li Changjing's protection, could Mo Chen be kept away from that demon-like person? The lifelong entanglement of the three people has just begun.