The second story is that he died in a fire a long time ago, but they think there is something fishy in it. It wasn't just the fire that killed him. Someone stabbed him, which is said to be arson. But in the end, there is no evidence to prove it directly, so he has been investigating. The cause of this incident was the sudden appearance of a woman named Qi Yuanyuan. Zhang Tong is very uncomfortable. This woman is the wife of the forensic doctor who died in the line of duty. The second time, the two old people found that the smell of their home was related to the upstairs. When they went upstairs, they found the body of a month ago and the body of a cat. After a long time, their faces have been ruined. The owner of this house is Qi Yuanyuan. If she died a month ago, who is the child who saw in the street? This can't help but make Zhang Tong suspicious. Later, he also saw a note on his door, which said that the place of the crime was the house with these two bodies. When the appraisal department and Ouyang went to know the situation, they suddenly fell from the sky and lost their noses when they came out. The people around him were very scared, but Zhang Tong quickly adjusted his mood, packed a kitchen knife with evidence and went back to the public security bureau to let them check whose fingerprints were on it. When investigating the cause of death of forensic doctors who died in the line of duty, they found that the murderer of this case was a woman. That evening, after work, a woman appeared in the public security bureau. It turned out to be Qi Yuanyuan! Qi Yuanyuan didn't die, so who died? Zou is a forensic assistant, and she also wants to see Zou's body. Without consent, Qi Yuanyuan left. When Tong Xiaochuan came back, he found that he had not left and told Zou that he had been missing for a long time. After her speculation, she also told her that Qi Yuanyuan was not dead, but Zou was dead. So what is Qi Yuanyuan coming back for? They stared at the cat, and someone broke its neck at once, which seemed very special. The cat had a skin disease, and the deceased had tinea on his arm, so they were twisted by the deceased. There must be something hidden in the cat. Qi Yuanyuan didn't find what she wanted. After she left the public security bureau, she went to the homes of two old people. Grandpa opened the door and was startled by the crowd at the door. He hit his head on the door and passed out. Tong Xiaochuan found an old comrade who was related to this matter at that time. He was demoted, but the reason has never been understood. Because Zou gave Qi Yuanyuan a false certificate. The old comrades knew about it, but they didn't stop it. Feeling guilty about it, he offered to be demoted. Zhang Tong found a USB flash drive in the cat's body, which contained evidence forged by Qi Yuanyuan. This is what she wants.

Qi Yuanyuan is ill. She brings her identity into the body of the person she wants to be and makes this person disappear. She'll kill them. They have identified her. The facts soon surfaced.