Da-Hae cross dresses as Sherlock K, a romance expert running a cafe. With sidekicks Kang-San and ex-hacker Jin-Joo, she helps clients navigate relationships using her profiling skills, commissioned by a chaebol.

Sherlock K is a beautiful woman disguised as a man. Commissioned by chaebol Do Min-woo, she runs a 'healing cafe' where she profiles love psychology. One of the newer ones from last year is Love Detective Sherlock K, a comedy centered on Da-Hae (Nam Bora) crossdressing to be "Sherlock K," a successful psychologist and relationship expert. She's assisted by her two trusty sidekicks, Kang-San (B1A4's Jinyoung) and Jin-Joo (Park Jin-Joo). Kang-San is Watson to Da-Hae's Sherlock; he is both her friend and protege, acting as an adorable foil to her intelligence and confidence. Jin-Joo manages the cafe that Da-Hae runs her relationship consulting business out of and is also an ex-hacker. She's sassy, loyal, and always down to help Da-Hae with whatever she may need.