Episode 31 recap: Guo Lun began investigating his sister's case.

After that, Guo Lun started looking into mobile phone-related documents and unexpectedly discovered many secrets. Secretary Su also found out that this time, the situation didn't give any face to Wu Shen Yuan. Luo Huai Gong can only compensate a sum of money quickly and consider the matter settled. The factory can no longer continue operating.

Now that Zheng Duo has settled down, Luo Huai Gong also stated that if Qi Heng continues to target him, he won't hesitate to send Zheng Duo to deal with him. Due to the verdict this time, which resulted in the death of a villager, Ma La Song and his group feel somewhat guilty. The chemical factory has been sealed off, and they are in the process of final settlement. Qi Heng knows that he has done everything he can in this matter, and now it's up to fate.

Ma La Song and Guo Lun arrived at the newspaper where Guo Nian used to work. Guo Lun discovered that the case his sister was investigating six years ago had made new progress. The editor-in-chief also confirmed that Guo Nian did indeed uncover some issues with the chemical factory six years ago, and later Hu Bai also investigated the related circumstances. The editor-in-chief shared all the information with them.

Guo Lun was originally supposed to attend an event, and Ma La Song accompanied him. Unexpectedly, they saw the director of the chemical factory secretly entering wearing a hat. Guo Lun, through hacking into the hotel's surveillance footage, discovered that the director had registered with a fake ID. After finding out the room number, Guo Lun went over and questioned the director if he still remembered the female journalist. Guo Lun even wanted to show him his sister's photo. Naturally, the director had seen Guo Lun before.

He mentioned the day six years ago, which happened to be Guo Lun's birthday. He had just come out of the factory when he noticed someone taking pictures nearby. To his surprise, it was Guo Nian. While Guo Nian was filming, a man suddenly rushed out, not only snatching the camera but also attempting to kill her to keep her silent. Guo Lun asked the director if he had any scars on his face, and upon receiving a positive response, Guo Lun immediately identified the target as Zheng Duo.

Now, Zheng Duo has been granted medical parole and returned home. Guo Lun inquired about Zheng Duo's situation, but Qi Heng still advised him not to get involved. Guo Lun was very angry and later sought out Ma La Song. Ma La Song urged him not to act impulsively and to consider the matter carefully. Guo Lun suspected that this matter was related to the boss behind the chemical factory, but the identity of this boss is still unknown. Guo Lun has only managed to uncover some clues at the moment. Ma La Song handed over all the information investigated by the newspaper to Guo Lun and believed that Zheng Duo didn't want anyone to discover anything related to the chemical factory. Guo Lun gave Ma La Song the articles his sister had written, as she suspected that Luo Huai Gong, the mastermind behind the chemical factory, was the big boss. Guo Lun now has a lot of evidence, but he is temporarily unwilling to give it to his brother-in-law, as he has always prevented Guo Lun from getting involved in the search for his sister's case.

Ma La Song also started analyzing layer by layer. The reason Zheng Duo wanted to kill Hu Bai was to prevent the matter from being exposed. The only explanation is that Guo Lun's sister had already been harmed. Moreover, a woman's body was found in the basement of the chemical factory. To verify this, Guo Lun went home and found a piece of clothing his sister had left behind years ago, hoping to find a strand of hair for DNA comparison.

Currently, the police are also investigating the case of the woman's body in the well. However, despite a considerable amount of time passing, the police have no leads. The superiors scolded the family members harshly. It is at this time that they receive an anonymous letter with a strand of hair, stating that it might belong to Guo Nian, the journalist who went missing six years ago.

Soon, after Old Hou learned about the situation, he called Qi Heng and Guo Lun. Qi Heng, who was least willing to believe the truth, faced the undeniable fact. Through comparison, it was confirmed that the woman's body was Guo Nian. Upon learning this, Guo Lun became extremely agitated and angrily ran away.

Qi Heng's emotions were in a state of deep despair. He mentioned that he knew back then that his wife was going to investigate the sewage case, but he never expected her to disappear like this. After a week passed without seeing his wife return, he initially had some suspicions. Later, he received a letter from Guo Nian, telling him that she didn't want to continue their relationship, so they separated.

Initially, Qi Heng truly believed that it was his own negligence that led his wife to leave him, so he didn't choose to report it to the police during the crucial time.