The story is based around Jin Yi-soo (Ahn Bo-hyun), who is a rich heir-turned detective, and Lee Kang-hyun (Park Ji-hyun), an experienced, workaholic detective, who has seen-it-all, and the first female team leader in the Homicide Department.

The poster has divided the characters in rows, in a unique way. The upper row comprises of Team 1 from the Homicide Department, which features team leader Lee Kang-kyun, her trustworthy friend Park Joon-young (Kang Sang-joon), and the youngest member who is always playing around, Choi Kyung-jin (Kim Shin-bi). Directly beneath them, we see Jin Yi-soo being around key figures. Renowned among them are Hansoo Group's chairman, Jin Myung-chul (Jang Hyun-sung), his wife Jo Hee-ja (Jeon Hye-jin), Jin Yi-soo's secretary Choi Jung-hoon (Kim Myung-soo), and the vice president of Hansoo Group, Jin Seung-joo (Kwak Si-yang).

More characters that will add to the story include Yoon Ji-won (Jung Ga-hee), a pathologist who works in the National Forensic Service, and Lee Kang-hyun's parents, Lee Hyung-joon (Kwon Hae-hyo) and Go Mi-sook (Yoon Yoo-sun).

The catchy slogan on the poster, "We'll escort you to a place where money and flex won't cut it," will shed light on a thriller of an adventure and how each of these characters contribute to the end goal. 

'Flex x Cop,' with its fusion of crime, drama, thriller and the disagreements between conglomerates and justice, will premiere on January 26 at 10 PM KST (6:30 PM IST).