Three weeks ago, Lin Xiaoxi, a junior member of Ningzhou University's Strange News Club, disappeared mysteriously while investigating the campus legend "Girl in School Uniform", leaving only a formatted memory card. When President Shen Wan was sorting out her belongings, she accidentally discovered a photo in her backup camera - taken in an abandoned teaching building on the night of the disappearance. In the picture, a girl wearing an old school uniform stood sideways with the number "17" embroidered on her chest. The time stamp on the photo showed that it was thirty years ago. What sent shivers down Shen Wan's spine was that she had seen the same school uniform in the old photo album left by her father. The police also characterized his father's death as an "accidental fall into the river" fifteen years ago. Someone in the club began to tamper with files, and anonymous threatening text messages came every night. The "ghost" might be sitting next to her. When Shen Wan got closer to the truth step by step, she discovered that some strange things were not caused by ghosts, but by sins that had been buried for thirty years by the living. And the Lin Xiaoxi she was desperately looking for might be trapped in a dark depth beneath their feet...
