Channel A's "Detectives' Trade Secret" focuses on a stalking case involving a woman who was preparing for a fresh start after divorce.

According to the production team, the informant began going on blind dates at the urging of her high school daughter after divorcing her husband following his workplace affair. During her life as a divorcee, she dated a fitness trainer but broke up due to his infidelity, and later grew close to a manager at a large corporation. The man also had a divorce history and expressed a desire to meet the informant's daughter, leading her to consider remarriage. However, the detective team's investigation revealed that this man had unimaginably perverted hobbies, leading to another breakup.

Afterward, the informant suffered severe anxiety as an anonymous individual had personal items such as shampoo, sanitary pads, and underwear delivered to her home in a stalking incident, prompting her to seek help from the detective team. The detectives identified five men around the informant as suspects and launched an investigation. The suspect list included: the recently separated perverted ex-boyfriend, her first romantic partner the fitness trainer, a coworker who secretly had a crush on her, her next-door neighbor's husband, and her ex-husband. Through a sting operation, the detective team secured decisive evidence and ultimately identified the culprit.

Comedian Kim Min-kyung, a former national shooting team member, joins as a one-day detective in this broadcast. When it was revealed that Kim Min-kyung is a "single since birth for 44 years," Defconn expressed concern about her handling of the case. In response, Kim Min-kyung surprised everyone by stating that she frequently consults on relationships and marital issues. Defconn livened up the atmosphere, saying, "Following 'Mal-ja Show,' I need to launch another show called 'Min-kyung Show.'"

After watching the case unfold, Kim Min-kyung confided, "I've lost faith in men again," and "There's not a single person you can trust." After the culprit's identity was revealed, Defconn expressed anger, saying, "This is a truly disgusting person," and Kim Poong called the perpetrator a "mortal enemy."

Meanwhile, "Detectives' Trade Secret" airs on Monday, August 3 at 10 p.m.