Xu Tongsheng was finally able to enter the archives and check the files and physical evidence of the Xu family explosion case that year, recalling his parents and childhood friend He Xi who died in the fire, and his experience of being sent by Zhao Zhiyuan to Xu Tongsheng to the welfare home opened by Jin Chun's mother after the incident.Xu Tongsheng returned to the welfare home and was immersed in sadness. Jin Chun came to comfort him.Jin Chun's mother Zeng Mingfang appeared and just greeted Xu Tongsheng. Jin Chun stood aside a little lonely.Jin Chun sent Xu Tongsheng to see the house. Under the introduction of the agency, Xu Tongsheng did not choose a house with better conditions, but instead chose a house with no home decoration, because the building opposite was Han Group.Xu Tongsheng moved into his new home, took apart the water heater, checked whether the left cuff of each piece of clothing had a directional sign, looked at the whiteboard full of clues and plans for investigation of old cases, and placed a video camera on the windowsill.After get off work, Shen Ye went to the noodle stall he often went to for dinner. The girl at the next table was watching the live broadcast of selling goods, but unexpectedly an explosion occurred during the live broadcast.Xu Tongsheng, who was about to take a shower, also received a call from the case.The deceased is Qin Qing, a female anchor who brings goods.The joint investigation team rushed to the scene of the crime. Jin Chun found some suspicious scars while inspecting the body. During the external investigation, Xu Tongsheng found that Shen Ye was afraid of dogs, and his sleeves were exactly the same as He Xi, and he had a moment of confusion.