There Is a Boundary Here

Six years ago, Lin Nian'an's father disappeared. Six years later, a belated clue put her back on the road to find her father. Five young people who had nothing to do with each other met her. The six people worked together to investigate the anomalies that appeared one after another, and gradually discovered—— The world that people take for granted is never the whole world. Under the boundary membrane, some people keep the boundary, some cross it, and some try to change the rules. And all the clues are taking them back to six years ago. What exactly happened that year?