Zheng Min told Zhi An his story, recalling that he came to Jinwan Factory as a part-time worker to help with storage and other tasks.However, in fact, after Zhengmin returned from the army, he tried to hack into a website called "Murthehelp" in the hope of becoming a famous black hat hacker, but his friends did not believe that he could do it.When they were getting ready to go home from the convenience store, they found a man who looked like a gangster standing at the door.After returning home, they were beaten by another group of people who asked them to hack the site again.Jung-min completes his mission, but his friend fails and is shot dead in front of him.Like a psychopath, Jung-min only asked if they would clean up the body.At this moment, an organization called "Babylon" selected Zhengmin and asked him to be their way into Jinwan's home.

Zhengmin brought a pen with a camera function into Jinwan's home for Babylon, and even tried to find out where the computer of the Murthehelp website was located.However, cameras and speakers were installed in Jinwan's home to communicate with his niece.Zhengmin was surprised at first, but Jinwan learned that Zhengmin was a computer engineering graduate and personally asked him to repair his computer.Jung-min walks into the lion's den, and Jung-min uses his skills to easily hack into the website and monitor Jinwan's activities in real time.When he returns home and the plan succeeds, he receives a message praising his performance, which he realizes is a message to kill him.To save his life, he immediately changed the code, revealing the truth only when he hacked the site.This was his insurance measure, but it didn't work at first. He immediately proposed to the boss on the phone a plan to completely solve the problem of entering the bay.The boss agreed to his proposal.

Ji-an is tired of hearing Jung-min’s life stories and demands that he tell her about her uncle.Zhengmin told her that as long as she continues to listen, everything will become clear.He tried to play the video Brother left as evidence, but the file was corrupted.He took out his USB flash drive, which contained recordings from his own pen-type camera.In a flashback, we learn that Jung-min used deepfake technology to imitate Ji-an's voice to make Jin-wan believe that Babylon has captured her.After Jin Wan told Zheng Min to ensure that Babylon would no longer harass Zhi An after he left, Zheng Min agreed and then committed suicide in the toilet.Zhengmin later found Jinwan dead in the bathtub and successfully completed the mission.

Zheng Min received a call and was told to kill Zhi An.Zhi An reminds him that she is green and needs protection.If he kills her, more people may retaliate.She tries to distract him to escape, eventually succeeding in trapping him.Zhi An looks at the documents that Brother handed over to her to find out what she needs to do.She discovered the escape route Jinwan had planned for her in case she didn't want to continue his legacy; however, she chose the same path as him.

In the house, Brother and Minhui tried their best to protect Zhi'an's safety.They set up iron gates, but the appearance of the robot dog allows Babylon's men to enter the house.They were trapped, but the robot dog opened a hole in the wall protecting Minhui and Brother, releasing poisonous gas.Minhui used the iron gate to eliminate almost everyone and the robot dog, but there was one person who seemed unable to be killed.Zhi'an arrived in time and threw two grenades, but the man named Kuma survived with severe burns.During the battle, the leader of Babylon ordered Zhi'an to be captured alive, but Kuma decided to destroy her face.Just as Kuma was about to stab her in the face, he shot and killed him.Tell Zhi An the letter and they don't have much time, because Bell is coming to find them, he is the murderer of Zhi An's parents.In the finale, Bell decides to send his best men to capture Zhian.