Luo Fei analyzed whether Xu Mingpu had a motive for killing Li Junsong. Xiao Jialin denied this possibility because Xu Mingpu had been in the hospital for treatment and did not leave during the crime when Li Junsong disappeared.When Luo Fei saw Xu Mingpu who was tortured by cancer, he said that he deserved Li Junsong's death.

When Luo Fei wanted to ask Xu Mingpu some questions, Meng Shengnan pushed the door open and she was Xu Mingpu's attending physician.Recalling the medical dispute between Xu Mingpu through the perspective of Xu Mingpu's son Xu Qiang.Luo Fei found the clues, and Xu Qiang couldn't resist and told him that Xu Mingpu was seriously ill and had no medical insurance. He asked Li Junsong to help lie to Xu Mingpu.