Hawaii's DeSor Resort Hotel. Chen Chen and the thin man shared a room. This wasn't by chance; it was forcefully arranged by the thin man.

An hour earlier, the plane had made an emergency landing at the Honolulu International Airport in Hawaii. Captain Richard was immediately taken to the hospital for treatment. The 57 passengers and 16 crew members on board were taken to the DeSor Resort Hotel, 7 kilometers away from the airport, by about seven or eight people in protective gear. According to the regulations of Hawaii's emergency epidemic management, all passengers need to undergo 14 days of quarantine observation upon landing.

An episode during the room allocation made Chen Chen feel that the thin man seemed to be deliberately getting close to him. Amidst the chaotic crowd, the thin man grabbed Chen Chen's arm and forcibly arranged for the two of them to share a room at the front desk. He even declined an invitation from the co-pilot, Olikol, to share a suite, clearly showing that Olikol had great respect for the thin man.

In the quiet room, they stared at each other. The situation was awkward for Chen Chen, having to share a space with a stranger. The thin man looked relaxed and immediately looked for beer in the fridge upon entering the room. He tossed a can to Chen Chen, which was declined.

"I don't drink," Chen Chen said coldly, placing the beer on the coffee table.

"Professor Chen, alcohol reliefs sorrow," the man said, opening the beer and taking a big gulp, appearing very pleased. It seemed the incident on the plane hadn't affected his mood at all.

"Alcohol reliefs sorrow", Chen Chen felt more than just sorrow at this moment. This roommate might not say much, but he often spoke with a hidden meaning, yet Chen Chen wasn't in the mood to delve into it.

Upon turning on his phone after landing, the news that popped up made him wish he could fly back to San Francisco immediately. The San Francisco police were looking for Xia Nan; her fingerprints were found on a weapon. Chen Chen became even more convinced that Xia Nan's disappearance was linked to the killer. Whether she had already met with misfortune or was about to was uncertain.

"You're worried about Dr. Xia Nan, aren't you?" the thin man said when Chen Chen stayed silent.

"Mr. Mo, have we met before?" Chen Chen wondered if he had any past interactions with this man who introduced himself as Mo Sijie. Yet, Chen Chen couldn't recall ever meeting him.

"Chen Chen, the newest Nofi Prize winner; I've seen you on the news. Dr. Xia Nan is now also very well-known in the US. Of course, you don't know me."

The thin man finished his beer and casually grabbed the one meant for Chen Chen. "You really aren't drinking?" Seeing Chen Chen's refusal, he smoothly opened another beer.

Chen Chen thought the man was really a heavy drinker. He didn't want to engage with his roommate anymore. It was always tiring for him to interact with strangers. Right now, finding Xia Nan was the priority.

"Professor Chen, don't be so distant," the thin man seemed to see through Chen Chen, "Regarding Professor Albert's murder, I might be able to help."

"You?" Chen Chen was shocked.

"I was the one who reported Professor Albert's murder, though the police aren't aware of this."

"Why are you telling me this?"

"You're the one who would be most worried about anything happening to Xia Nan."

"Do you know Xia Nan?"

Before the thin man could answer, a news notification on Chen Chen's phone made him gasp.

"Insider reveals Xia Nan's past: Was raped as a minor and gave birth to a daughter."

"Neuroscience authority rapes a minor, she seeks revenge 20 years later!"

"Unraveling the mystery of Professor Albert's murder."

...

Reading the sensational headlines, Chen Chen couldn't believe the Xia Nan in the media was the one he had known for over a decade. The notion that Xia Nan was raped by Professor Albert, and that their daughter was Angela, was outrageous. It angered Chen Chen how the media could be so irresponsible with their fabrications. Yet, amidst his anger, he felt fear. What if there was some truth in these news articles?

"I know her! 21 years ago, Xia Nan's parents hired me to investigate that rape case."

"What are you saying?" Chen Chen couldn't believe his ears, "So these reports are true?"

"At least half of them are."

"Which half?"

"Xia Nan was raped and gave birth to a daughter."

"Angela?"

"Yes."

"What about Professor Albert?"

The tale has been taken without authorization; if you see it on Amazon, report the incident.

"I'm not sure."

"What do you mean you're not sure?"

"I haven't found the rapist yet."

"What else do you know?"

"Professor Chen, Dr. Xia Nan should have been the one to tell you this. But now that the media has exposed it, I might as well speak."

------

21 years ago, on a hot and dry afternoon, his friend Coleman came to him with a Chinese couple. That couple is also a friend of Coleman.

The man looks very excited. Before discussing the case, it is very normal for Mo Sijie to require him to keep it confidential.

The case is very simple. The couple's daughter was raped on the way out of school. They didn't want to report to the police, which made everyone aware, but their father didn't want to let the bad guy go, so he entrusted Coleman to find Mo Sijie. The daughter of this couple is Xia Nan.

Mo Sijie usually doesn't handle such cases. At the time, he was working at the FBI and had an important case to investigate, which was really lacking in skills. Under the man's bitter plea, Mo Sijie finally agreed, and he could see that the man was really at a loss. With his ability, rape cases like this can be closed within three days.

Mo Sijie met Xia Nan in the single room of Theresa Hospital. The girl's spirit was strongly stimulated, resulting in a brief period of aphasia. He checked Xia Nan's examination records and found that there was a severe tear in the lower body, accompanied by a slight concussion.

Xia Nan, who was delirious in the ward, occasionally screamed in panic. She couldn't talk to anyone. When Mo Sijie, a stranger, stood in front of her, she was so scared that she covered her head with a blanket. Through the blanket, Mo Sijie saw her trembling.

What a beast! The fire of anger burned within Mo Sijie's body, and raping underage girls was the thing he hated the most. Looking at Xia Nan in front of him, he thought of his sister Mo Sijia. Five years ago, his 15 year old sister couldn't escape the shadow of being raped by thugs and jumped off a building to commit suicide. At the time, he was working on a case in Icca, located in the Middle East, but he didn't even see her last face.

Mo Sijie secretly swore in his heart that he must find this heinous rapist. However, a real problem lies ahead, without any valuable clues! The only hint is on Xia Nan's way home from school, and I don't know where it is. Twenty one years ago, there was no surveillance on the street, so how can we check.

He spent a whole ten days investigating along the road from Xia Nan's School to his home. Excluding each section one by one, only an alley less than a kilometer away from the Heaven slum remained. On the night before the rape incident, a brutal massacre occurred in the Heaven slum. The people living in the slums were cursed and killed each other, but none of them were spared.

When Mo Sijie said this, he stopped and let out a long breath. Chen Chen noticed a subtle change in his face. After a pause, we continued our conversation.

There are almost no valuable clues found at the scene of the crime, after all, it has been more than ten days since the incident occurred. He found a sharpened stick in a corner, with an R engraved on it. He recognized the stick and had seen it on the night of the Heaven Slum Massacre. The owner of the stick was named Ryan.

It shouldn't be here! The police reported that all residents of the Heaven slum died tragically on the night of the incident. Didn't he die? Is it Ryan who raped Xia Nan? He thinks the possibility is very high.

"Professor Chen, do you believe in intuition?" Mo Sijie suddenly asked Chen Chen.

"In the field of scientific research, intuition has certain inspiration," Chen Chen replied, maintaining his usual rigor.

"I do! My intuition tells me that the person who raped Xia Nan is 99% Ryan." Mo Sijie's can in his hand had been crushed out of shape.

"But you haven't found this Ryan?" Chen Chen asked impatiently.

"No. I've never given up on looking for him, but unfortunately, I haven't found him," Mo Sijie said with a hint of dejection.

"How has Xia Nan been since then?"

"I didn't complete the task, and Xia Nan's parents refused to let me get close to their daughter."

"How did you know that Angela is Xia Nan's daughter?"

"That matter was kept extremely secret by Xia Nan's parents. They really went to great lengths for their daughter's future. But I work for the FBI; nothing can be hidden from me if I want to know."

"You continued to track Xia Nan? Don't you know this might disturb her life?"

"Xia Nan doesn't know about me. She's even forgotten everything that happened."

Suddenly, Chen Chen recalled that Xia Nan had lost that segment of her memory. He was glad he had stopped Xia Nan from seeking that memory. Otherwise, she would have had to go through the pain again.

In an instant, Chen Chen realized why Xia Nan went to find Professor Albert. She must have asked Professor Albert to use a memory extractor to retrieve her lost memories. Xia Nan had never given up on finding her memories. A bold guess popped into his prefrontal cortex, and he was afraid of his own speculation.

"Could your intuition be wrong?"

"Professor Chen, are you suspecting Professor Albert?"

"No!"

"Professor Chen, I guess you're thinking that Xia Nan went to Professor Albert to extract memories, and in those memories, she saw the person who raped her years ago. That person was none other than Professor Albert, who was helping her with the memory extraction. Therefore, Xia Nan killed Professor Albert."

People from the FBI are really sharp! Chen Chen thought. Just with a simple question, Mo Sijie had seen right through him. Before Chen Chen could respond, Mo Sijie continued:

"The evidence and motive for the murder all point to Xia Nan, but I trust my intuition. Professor Albert wasn't the one who raped her back then."

"Mr. Mo, after all this, you came to me today for something else, right? If it weren't for the media exposure, you wouldn't have even told me this."

"You got me," the slender man chuckled. "You professors are a bit lacking in observation skills."

"Mr. Mo, no need to beat around the bush."

"I suspect Professor Albert's death is related to the Super Brainwave!"

Chen Chen's head buzzed. It seemed impossible. How could Professor Albert's death and the Super Brainwave be related?

"Let me reintroduce myself. Mo Sijie, Chinese-American, former FBI agent. I came specifically to find you because I need your help. The Super Brainwave is likely a terrorist act, and maybe Professor Albert was killed because he discovered its secret."

In just a few sentences, the information was overwhelming. The Super Brainwave, terrorist activities, Albert, and Xia Nan were all implicated in the murder of Professor Albert.

"How can I assist you?"

"We need to find out who's behind the Super Brainwave."

"Why do you think I'll help you?"

"Because of Xia Nan and also Professor Albert. If we find the real culprit, Xia Nan will be safe, and Professor Albert can rest in peace."

Chen Chen looked at the slender man in front of him with suspicion. He had never considered that the Super Brainwave could be a terrorist act.

"Do you have evidence that the Super Brainwave is a terrorist act?"

"I might have had some if Professor Albert hadn't died."

"You knew Professor Albert?"

"Five years ago, the professor secretly hired me through the dark web to investigate someone."

"Professor Albert hired you to investigate?"

"Yes, he realized the person I was investigating was the same person he wanted to look into."

"Who?"

"Ulysses!"

"Why were you investigating Ulysses?"

"This goes back 21 years."