A black cat named Lin Ye has a special evolution system that can continuously become stronger by absorbing special energy. He shuttles between Jinghai University and the city. On the surface, he is the "Little Black Senior" loved by students, but secretly he is the "Night King" who protects the peace of the campus. Lin Ye led the Maomao Gang to guard the homes of stray animals, and at the same time discovered that there were unknown dangers lurking in the darkness of the city. In the confrontation with various challenges, Lin Ye protected the friends who cared about him while gradually uncovering the hidden truth of the world.
