The University of Edinburgh, located within the French Concession, unearthed two skeletons while digging a well on the southeast corner of the campus. Inspector Chen from the detective bureau arrived at the scene with his son TianSheng. Based on the skeletal structures, TianSheng preliminarily deduced that the dead were a man and a woman. While identifying the watch, earrings, and ring found at the scene, Forensic pathologist Ling Han was horrified and painfully discovered that the female corpse was actually her mother, Song Min, who had mysteriously disappeared ten years ago, and the male corpse should be Liang Zhongping, a colleague of her mother.