On a rainy night, Wang Xingjun, an on-duty worker at a metal processing factory, received a package, but he hadn't bought anything recently.There was a huge explosion, and the courier boy who put down his things and left lit a cigarette, and the duty room behind him burst into flames.

Ducheng led the police to the scene to investigate, and only found the remaining express boxes and some toy fragments at the scene.Ducheng worked overtime until late at night to check on unsolved bombings in the past. Shen Yi, who was going home, decided to stay and read the files with Ducheng.The two were busy all night, and finally at dawn Shen Yi discovered that there were toy fragments in the photos of the scene of an explosion.

The first explosion occurred in an apartment. The victim, Zhao Jianyu, was seriously injured and is still unconscious in the hospital.Based on the toy fragments left at the scene, Ducheng determined that the two cases were committed by the same person. This was probably a serial bombing case. Director Zhang ordered Ducheng to solve the case within a time limit.

Jiang Xue restored the bombs used in the two cases. She believed that when Zhao Jianyu was injured in the first case, the bomber did not have much experience in making bombs, but in the second case when Wang Xingjun was killed, the bomber had no experience in making bombs.It has been improved, so it is much more powerful than the first time.However, the bombs used in both cases were homemade and the raw materials were easily available, so there was little significance in tracing them.

When discussing the case, Du Cheng believed that the two cases were targeted retaliation. Jiang Feng investigated and found that Zhao Jianyu and Wang Xingjun worked in the same metal processing factory and had a superior-subordinate relationship.During the visit, Shen Yi found vouchers for Peng Ge Bistro in both Zhao Jianyu and Wang Xingjun's homes. After investigation, he learned that Zhao Jianyu and Wang Xingjun had a quarrel with the waiter in Peng Ge Bistro not long ago. Now this waiterHas been fired by restaurant manager Li Hui.Shen Yi suspected that the service bureau was the bomber, and Du Cheng hurriedly contacted explosive ordnance disposal experts and rushed to Li Hui's house.

EOD experts found only a clock in Li Hui's express delivery. At this time, a car on the cross-sea bridge exploded.The victims of the third explosion were Zhang Weifeng and his girlfriend Gao Miao. Du Cheng rushed to the scene after receiving the police information, and Shen Yi found toy fragments again at the scene.At the same time, Jiang Feng also found the imprisoned waiter in the detention center and concluded that he had no time to commit the crime.Zhao Jianyu, the survivor of the first bombing, was awake. Du Cheng and Shen Yi came to him to find out the situation, but Zhao Jianyu did not tell the truth.

Jiang Feng brought back the news that Zhao Jianyu and Zhang Weifeng had attended the same summer camp when they were students. Both of them dropped out of school and went abroad after the summer camp and only recently returned to China.Li Han found out that an accident occurred when a student fell off a cliff when Zhao Jianwei and Zhang Weifeng were participating in the summer camp. Li Liankai, who fell off the cliff and died, was in a group with them. The summer camp was arranged for groups of four, and the remaining person was named Liu Xiaochen.

Li Liankai, whose parents were divorced, had been living with his father Li Weijun, who was a courier.Du Cheng came to Li Weijun's residence with a search warrant. Although he did not catch Li Weijun, he found equipment for making explosives in the attic.Shen Yi found four strange portraits in the room. He wanted to go back to the bureau to study them carefully. Du Cheng asked him to hand over the unknown drugs found in Li Weijun's house to the forensic doctor He Rongyue.

He Rongyue analyzed that the unknown medicine was used to cure mental illness, and Shen Yi learned that Li Weijun suffered from prosopagnosia.Shen Yi perfectly restored the portraits of Li Weijun's four targets based on the painting characteristics of the four portraits, and told everyone that Wang Xingjun was not Li Weijun's target, but that Li Weijun mistook Wang Xingjun for Liu Xiaochen because of prosopagnosia.Jiang Feng felt that he should go to Liu Xiaochen's house for surveillance now. Shen Yi suggested that he go to the toy store run by Lin Zhijie, the fourth person in the portrait, for surveillance. Although he was not on the list of the summer camp, he also had a record of going abroad, and Shen Yi firmly believed that face blindnessLi Weijun did not know that he had killed the wrong person.

Jiang Feng reported the situation to Ducheng, while Shen Yi was in the toy store.