Episode 18 recap: Chun Yu discovered the secret of her father's diary.

When Chun Yu returned home, she saw her grandmother about to put on the Tianji helmet. She quickly stopped her and asked about the source of the helmet. She discovered her father's secret and found a locked notebook. It turned out that Yan Ming Liang deliberately manipulated everyone in the game in order to lure out the person who was helping Chun Yu from behind. However, they were all close to death and had not yet appeared, so Chun Yu speculated that the person was among them.

In real life, everyone began to realize that they were being followed. Suddenly, Chun Yu woke up and looked around to find herself lying at home. Her grandmother came in and told her that two girls had brought her back. She called Gao Xuan and recalled the scenes from the game. Finally, Xu Wen Ya came up with the idea of dismantling the bomb from the bicycle and tying it to the water house. Everyone thought it was the only way, so Chun Yu pressed the detonator. The explosion caused Yan Ming Liang and the staff's workbench to shake. They couldn't escape from the game. Chun Yu performed CPR on Gao Xuan non-stop, and finally saved him just before the game ended.

Gao Xuan thanked Chun Yu for saving him during the phone call. He was brought back to the dormitory by his senior sister. He said that the more Yan Ming Liang acted like this, the less he would give up. Gao Xuan told the netizens about Yan Ming Liang's untrustworthy behavior. The netizens advised him not to tell anyone about his information and suggested that he go to the equipment department of MicroTech, where the pulse device could be used after assembly. MicroTech was the technical supporter of Tianji Technology.

Gao Xuan wanted to tell Chun Yu about this, but the netizens didn't respond. While her grandmother was about to wear the Tianji helmet, Chun Yu luckily discovered it in time. She chased after the delivery person but found that the delivery had already left, while Chun Yu received messages from other teammates that their families had received technological products from Tianji Company, which they quickly destroyed after being exposed.

Yan Ming Liang's intention was clear - if they didn't obey, he would use their families as leverage. Since they had no way out, they decided to confuse Tianji in reality and make them think that they were content with the current situation. Yan Ming Liang repeatedly watched the game video, hoping to identify the person who helped Chun Yu behind the scenes. He even suspected that the person might be disguising themselves as one of them and secretly helping them crack the game.

While looking at a family photo, Chun Yu accidentally discovered a key in the picture frame. Yang Ba Wan went out of his way to get a comfortable chair with a backrest for Xiao Qin in the restaurant, but this caring gesture made Xiao Qin uncomfortable, and she rejected him in front of everyone. Yang Ba Wan felt someone was monitoring him in the restaurant, but in reality, Yan Ming Liang was monitoring each of them on a big screen.

Xiao Qin picked up the box on the table and found a notebook inside, along with a key. Chun Yu was curious about the key in the picture frame and immediately went to her father's dormitory to search for things. Xiao Qin opened the notebook, which turned out to be a gift from Xu Wen Ya. Xu Wen Ya had written heartfelt words in it, calling it their communication bridge. Xiao Qin found it old-fashioned but couldn't help but reply to her in writing.

Chun Yu saw a thick book on the bookshelf and found a locked password book inside. The first page read, "Happy birthday, Dad." It was her father's diary, a gift she had given him when she was younger. Chun Yu looked at the stories of her growth recorded there and became increasingly sad. It was all about her, documenting her father's love and education for her.

Finally, she read about what happened after her father arrived in Jiangning. Every day, he wrote about wanting to start anew and whether he could give him a chance. Then, the diary turned blank, with only a memory card on the last page. When classmates teased Yang Ba Wan about his story with Xiao Qin, he got angry. Xu Wen Ya tried to persuade Yang Ba Wan, saying that he didn't treat Xiao Qin as a joke, and Xiao Qin didn't want to be seen as an abnormal person.

After class, Gao Xuan realized he was being monitored, and Yang Ba Wan and Xu Wen Ya also felt they were being followed. They all maintained their normal behavior, not wanting to alert anyone. Nian Su Lan came to find Gao Xuan and entered his room directly.

Chun Yu, looking around and finding no one following her, went straight to Gao Xuan but was surprised to see Nian Su Lan opening the door. Both were taken aback, but Nian Su Lan treated Chun Yu like family and said she brought Gao Xuan some supplements because he wasn't feeling well. Chun Yu saw the green tea and honey on the table, which not only weren't supplements but could also worsen Gao Xuan's stomach condition.

Chun Yu privately gave the memory card to Gao Xuan, hoping that he, as an expert, could crack the password. While Gao Xuan was in the process of deciphering, Nian Su Lan called him away temporarily. Chun Yu waited alone for the decryption process. At that moment, she received a message on the computer. After reading the message, she directly unplugged the memory card and lied, claiming she hadn't cracked it. It was evident from her expression that she was angry.

Chun Yu left, and Nian Su Lan mistakenly thought it was because of her. Gao Xuan also reminded her to discuss the thesis in the classroom from now on. Gao Xuan called Chun Yu again, hoping to use different software to crack the password, but Chun Yu didn't want to pay any attention to him. She unintentionally heard him mention that the password might be related to a birthday. Chun Yu discovered the day of her mother's death from her father's birthday book and decrypted it, only to find all the patterns of the 19-level game inside.