Liu Xiuyue used Bai Rongzhu's darknet account and password to go to the darknet. Someone immediately sent him a message, and the other party also knew his original name of Yin Jaexi. Liu Xiuyue had a headache and fell into that memory cycle again. This time, he opened the door of 1002 and saw that he was wearing a yellow raincoat when he was a child, while his biological father was stabbed to death lying on the ground. Liu Xiuyue checked the previous news and found that her father's case was a murder case, while her mother told him it was a fire case. He called his mother for verification, but no one answered. Liu Xiuyue drove home and found her mother's mobile phone and hospital records in the cabinet. Only then did he know that her mother was suffering from Alzheimer's disease.
Liu Xiuyue woke Liu Dongyue, and the brothers went to find their mother together. Liu Dongyue found her first and brought her home with Liu Xiuyue. Liu Xiuyue complained about why her mother didn't tell her about it, her mother's words made him speechless. It turned out that his mother was worried that she would drag him down, so she was reluctant to speak out about her condition. The next day, his mother asked him to ask what he wanted to ask. Liu Xiuyue couldn't help crying. He might have killed his father back then, but even so, his mother was willing to take him in. The mother clearly told him that Yin Jae-hee at that time was just a child who ran away desperately to survive, and in her heart, he was always kind. The mother's words soothed Liu Xiuyue's heart.
Wu Jingtai went to Shen Zhengxun to verify the testimony, saw the scar on his hand, and suggested that he call the police, but Shen Zhengxun did not care. Liu Xiuyue grabbed K and asked him if he knew something, otherwise why did he keep preventing him from opening that door, K said frankly because he was afraid that he was the one who killed his biological father. Afterwards, Liu Xiuyue took K to the psychiatrist, and listened to the doctor saying that the memory may be tampered with, and the purpose of the tampering may be to hide the more terrifying truth. Afterwards, Liu Xiuyue began to look through the previous cases and found a man named Sheng Fujun, but what he said was like a reciting confession. He said it too clearly, but it caused suspicion.
Li Xiqian found out from the prison guard that during Sheng Fujun's detention, someone always wrote to him, and this writing took a long time. K and Liu Xiuyue came to Sheng Fujun's house and found the box of letters. These letters were actually written by Zheng Yunhao to Sheng Fujun. Zheng Yunhao was the most suspected person at the time. Hundreds of letters he wrote to Sheng Fujun were exactly the same, and they were exactly the same as Sheng Fujun's confession. Liu Xiuyue immediately understood that someone had tampered with Sheng Fujun's memory by taking advantage of Sheng Fujun's medicinal strength. Sheng Fujun walked in at this time, and faced with Liu Xiuyue's questioning, Sheng Fujun suddenly pushed his head into the water frantically, and Liu Xiuyue remembered some scattered memories.
In memory, Liu Xiuyue and Zheng Yunhao knew each other. Liu Xiuyue went to the dark web and confirmed that the person who sent him the message was Zheng Yunhao. People from the Tianhe District Government, the armed police, went to Shen Zhengxun's house to help him. They found that Shen Zhengxun's brother was dead at home. Shen Zhengxun sat opposite the corpse and watched blankly. As a suspect, Shen Zhengxun was brought back to the police station for interrogation. Soon after, Wu Jingtai came to tell Liu Xiuyue that Shen Zhengxun had an alibi, that when his brother died, Shen Zhengxun happened to be stealing money from the store and was photographed by surveillance. Shen Zhengxun left the police station, and Wu Jingtai and Liang Zaishan were responsible for following him. In order not to be discovered by him, Wu Jingtai also pretended to catch Liang Zaishan and performed a good show.
Liu Xiuyue found a woman named Qi Suyan very suspicious. He followed the place Qi Suyan had been staring at upstairs and found a manhole cover and a flowerbed. Wu Jingtai took off the manhole cover and found a crime tool inside. Liu Xiuyue asked him to take the crime tool back to the National Academy of Sciences for search, and she found out that the blood on it belonged to Shen Zhengxun's brother and Qi Suyan's DNA. It was just that before they could ask Qi Suyan what to do, Qi Suyan was killed and was seriously injured and sent to the hospital for rescue. Wu Jingtai showed Liu Xiuyue a photo of Qi Suyan's ex-boyfriend Park Sung-Gwan. It is said that Park Sung-Gwan has been pestering Ki So-yeon after breaking up and abused her. The strange thing is that Shen Zhengxun has been seen wherever Park Chengguan appeared.
Liu Xiuyue's brain was running fast, and she suddenly thought that Qi Suyan was very likely to exchange murder with Shen Zhengxun, and they had alibi for each other. Realizing that Park Chengguan was in danger at this time, Liu Xiuyue rushed to stop Shen Zhengxun from killing, and Shen Zhengxun accidentally stabbed him. Liu Xiuyue was stimulated and remembered some memories from the past, his biological father was not killed by him. But K was holding a knife with blood on his body, and he said he had murdered.