Senior Inspector YIU HOK-SUM is attending a mind-reading course in the US. SUN’s father YIU TIN-PO died when he was a child. The unhappy memory of how he witnessed his father’s death comes back to him during a lesson. SUM has returned from the US. His mother, CHUNG SAU-HAN, hopes that he can go to dim sum with his stepfather, CHING SHIU-HONG, and his sisters. SUM goes with his half sister, PUI-YEE. At the restaurant, SUM finds a customer’s behavior very strange. On the day he resumes his duties, SUM finds that his team has grown stronger. In addition to old members MAK WING-HEI and WU HAU-YING, Sergeant HO LAI-YIN and Station Sergeant YIP CHIN-TING have also joined the team. SUM cracks a scapegoat plot with just a small effort. TING and YIN are impressed by his remarkable mind-reading skills and powers of observation. A woman named LEUNG SZ-MAN has been strangled. SUM, TING and other team members arrive at the scene……

SUM uses the concept of intimate distance to explain MAN and SANG’s underground relationship. YIN does not agree with his conclusion. SUM has bought a gold peach for HAN on her birthday. SUM’s aunts have never liked HAN, so they are jealous when they see the gold peach. They even tease about HAN’s humble background when she is singing on the stage. SUM and TING interrogate SANG’s wife, MEI-YU. They are surprised when YU stresses that SANG and she are an affectionate couple. According to the result of HEI’s investigation, SANG has lost a lot of money in investment. He once lost two million dollars at one go, but he only earns fifty thousand dollars a month. What is even more unusual is that he is always able to recover his debt. YIN arrests SANG, who is trying to flee. SUM and YEE see a robbery. When SUM is describing the robbers’ features to the police officers in charge, MEI-SZ, an old friend of his, walks towards him.

SUM visits SZ at her memory school. SZ introduces LAI CHUN-HUNG, one of the tutors, to him. SUM and SZ have lunch together. SUM tells SZ he would not have become a cop if she had not taught him the Memory Palace memory skills when they were young. A man has jumped down from a building. SUM is astonished to learn that the man is HUNG. He concludes this is not an ordinary suicide. SZ reveals that another tutor named WILSON has once invited HUNG to join another school. She managed to persuade HUNG to stay by paying him a lot of money, but by doing so, WILSON had to pay the other school three million dollars as compensation. YIN asks SUM why he did not take WILSON back to the station. SUM says he needs to pay attention to WILSON’s microexpressions, but he fears YIN’s double charge pen spinning trick will affect him. SUM goes through the teaching VCDs of SZ’s memory school. TV host NGAI WAING-SHAN was one of HUNG’s students……

HEI reports to SUM and TING on what he has found in HUNG’s room. He suspects HUNG has joined a religious cult. YIN goes from house to house trying to find out more about the case. According to a videotape provided by a neighbor of HUNG’s, HUNG and WILSON had a fight on the rooftop the night before he died. SUM calls TING back to the police station, where he tells her about his discovery of SZ and HUNG’s relationship. YIN and SUM have an argument. YIN accuses SUM of favoring SZ during his investigation. This nevertheless inspires SUM, who returns to where HUNG ended his life with TING immediately. When they get there, SUM points out that HUNG’s death might have something to do with the Memory Palace memory skills. Later in the evening, SZ gets a call from WILSON threatening to…

The case has been closed. SUM and his teammates celebrate at a bar. YIN cannot believe it when SUM commends his performance. YEE is chilling out with some friends nearby. A friend of hers is also good at pen spinning. So she calls and invites YIN to have a competition with her friend. The next day, YEE is organizing an anti-crime activity at a shopping mall. She is thrilled by surprise when YIN shows up. UNCLE LEUNG, the chef of Tai Hung To Restaurant, is retiring soon. The Ching family throws a banquet for him. YIN-HA, one of SUM’s aunts, accuses HAN for badmouthing his son CHIT-KIT for no apparent reasons. Famous artiste CHOW YUEN-WAI reports to the police that TANG CHUNG-HIN, son of a tycoon in town, has raped her. He is holding a wedding ceremony when the Serious Crime Unit arrives at his place. At the police station, HIN recalls how WAI seduced him at a bar and how they ended up at a hotel.