She is the last batch of students at Dali Animal College. On a rainy night in 2003, she witnessed a murder case by the Xianxi Lake. She wrote everything she witnessed in her diary. Eighteen years later, the dormitory became a deserted and dangerous building, and this diary that had been dusty for many years was accidentally discovered. The closed disappearance and drowning cases were reopened, blood surged under the calm lake surface, and three cases that had been buried for eighteen years were fished out of the lake with the discovery of the diary.
