After investigating the crime scene, Alan felt compelled to dig into Tom's backstory. He began contacting Tom's friends and family, trying to get more information about Tom from them. At the same time, Alan also investigates Tom's jewelry store, hoping to find clues related to the murder from business activities.

After some hard work, Alan finds a close friend of Tom's named Jack. Jack is willing to share some information about Tom with Alan. During his conversation with Jack, Alan learns the following facts about Tom:

Tom's jewelry store is thriving, but has recently come under pressure from a competitor. The company, called "Black Lotus", is involved in the smuggling of precious jewelry in an attempt to monopolize the market through illegal means. Tom has been trying to expose "Black Lotus's" illegal behavior, which has made him quite an enemy.

Tom's wife, Kate, died a month before the incident, and the cause of death was a sudden car accident. Kate's death is a huge blow to Tom, but Tom is strong enough to endure the pain and continue to run the jewelry store. Jack believes that Kate's car accident may be related to "Black Lotus", but there is no evidence of this at this time.

Tom gets close to a woman named Lily in his social circle. Lily is an artist who paints landscapes. Alan remembered the painting in Tom's room signed "L.W", and suddenly knew that the painting should be Lily's work.

Tom had received an anonymous letter a few days before the incident, warning him to abandon his investigation into the Black Lotus or face serious consequences. Tom didn't take the letter to heart at the time, but Jack thought it might be a precursor.

With this background in mind, Alan began to revisit the case. He felt that Tom's death had a lot to do with the illegal activities of "Black Lotus". In order to investigate "Black Lotus" in depth, Alan decides to infiltrate the mysterious company and learn first-hand about its inner workings.

In the course of his in-depth investigation, Alan also uncovered some shocking facts. It turns out that the leader of this criminal network is none other than Tom's former rival, a wealthy businessman named Victor. Victor controls the city's jewelry market through the Black Lotus, and he is desperate for power and wealth in his hands, and will stop at nothing to maintain his position.

In order to find out the true relationship between Victor and Tom, Alan began to secretly contact people close to Victor. Along the way, Alan encounters an unexpected figure: a mysterious woman. It turns out that she is Victor's assistant and is responsible for handling various affairs for him. However, the mysterious woman feels guilty about Victor's crimes, and she tells Eren that she has been looking for an opportunity to expose Victor's crimes so that he can get the punishment he deserves.

Believing that going deep into the interior of the Black Lotus is the key to revealing the truth, Allen begins to plan a disguise operation. He first conducted an in-depth study in the field of jewelry identification, and became familiar with the characteristics and identification methods of various precious gemstones. Next, he faked a perfect resume to cast himself as an experienced jewelry appraiser. In addition, Eren also deliberately changed his image so as not to be recognized by Victor's men.

After the preparations were completed, Alan applied for the position of jewelry appraiser at Black Lotus. During the interview process, he successfully won the favor of the interviewer with his excellent professional knowledge and rich experience. In this way, Alan successfully blended into the "Black Lotus".

After entering the "Black Lotus", Alan began to collect evidence related to the smuggling of precious jewelry. He discovered that the company was illegally buying rare jewelry from abroad and then smuggling it into the country through a series of sophisticated means. Domestically, the jewels were sold at high prices to wealthy and black market vendors, thus generating huge profits for the "Black Lotus".

Allen also noted that this vast criminal network involved not only the smuggling of precious jewelry, but also a series of illegal activities such as bribing government officials and threatening competitors. In order to keep this criminal empire running, Victor manipulates many underworld forces behind his back, and even hires killers to deal with those who dare to challenge his position.

However, there are also some employees within "Black Lotus" who are dissatisfied with these crimes. In the course of Alan's investigation, he gets to know some people who also want to uncover the truth. These people became Allen's insider, providing him with a lot of key information that helped him gain a deeper understanding of the workings of "Black Lotus".

Through in-depth investigation, the true face of "Black Lotus" gradually surfaced. Allen understands that only by finding out who is behind the scenes can this criminal network be completely destroyed. In order to bring Victor to justice, Alan continues to actively gather evidence and look for opportunities

In order to find out the true relationship between Victor and Tom, Alan began to secretly contact people close to Victor. Along the way, Alan encounters an unexpected figure: a mysterious woman. It turns out that she is Victor's assistant and is responsible for handling various affairs for him. However, the mysterious woman feels guilty about Victor's crimes, and she tells Alan that she has been looking for an opportunity to expose Victor's crimes so that he can get the punishment he deserves

In order to find out the true relationship between Victor and Tom, Alan decides to take the risk of reaching out to people close to Victor. At a lavish dinner hosted by Black Lotus, Alan takes the opportunity to talk to Victor's assistants, trying to extract information about Victor from their mouths.

At the dinner, Alan noticed a unique woman with twinkling eyes and a melancholy expression. The mysterious woman, named Sophia, is Victor's right-hand man and is in charge of his business affairs. Alan sensed that she seemed different, so he decided to approach her and test her bottom line.

After some conversation, Alan discovers that Sophia is actually guilty of Victor's crimes. She used to be a person with a strong sense of justice, but because of life, she was forced to work for Victor. During her conversation with Alan, she sensed Alan's righteous heart and decided to confide in him.

Sophia tells Allen that Victor has repeatedly threatened Tom to abandon his investigation into the Black Lotus, but Tom insists on justice and refuses to give in. Eventually, Victor decides to send someone to assassinate Tom and destroy his business completely. At the same time, he also creates Kate's car accident to break Tom's will.

After hearing this, Alan was deeply furious and strengthened his determination to let Victor be punished. He forms a close alliance with Sophia, gathering evidence against Victor and finding the right opportunity to bring him to justice.

In order not to arouse Victor's suspicions, Alan and Sophia must act carefully. They used a variety of opportunities to gather evidence, including records of smuggled goods, transactions that bribed government officials, and other criminal activities in which Victor was involved. In the process of gathering evidence, they also uncover Victor's collusion with other gangster forces and how he uses his power to control the entire criminal network.

This difficult collaboration between Alan and Sophia has led to a deepening of their relationship. Alan developed a respect for Sophia's wisdom, bravery, and sense of justice, and Sophia was infected by Alan's unwavering faith and courage. In the process of exposing Victor's crimes together, they build a deep trust.

By chance, Alan and Sophia finally find the key evidence to defeat Victor. Sophia discovers a secret document in Victor's office detailing how Victor planned the assassination of Tom and caused Kate's car accident. This document will not only prove Victor's crimes, but also reveal the criminal network behind him.

Alan and Sophia decide to hand over this evidence to the police and bring Victor to justice. However, in the process of carrying out the plan, they were ambushed by Victor's men. After a thrilling struggle, Alan and Sophia managed to escape and get the evidence safely into the hands of the police.

Guided by the evidence, the police launched an all-out crackdown on Victor and his criminal network. Victor was eventually arrested and confessed to his crimes in court. He was sentenced to a harsh sentence to get justice for Tom and the other victims.

After this thrilling investigation, Alan and Sophia fight for what is good in the world, so that evil has nowhere to hide. After Victor is brought to justice, Alan and Sophia decide to continue working together to expose more sins and protect justice and peace