Starring Ju Ji-hoon, Park Sung-woong and Choi Sung-eun, the film depicts story of the president of a secret agency, who pretends to be a prosecutor to find a missing client and chases bad guys regardless of whether it is illegal or legal.

Hyun-soo learns that the incident he thought was a simple kidnapping is related to Kwon Do-hoon (Park Sung-woong), a law firm tycoon.

While digging into the ugly crimes of a large law firm conglomerate, they encounter a completely unexpected situation.

[1] Jung Jae-hyun of Cine21 reviewing the film praised the acting, writing, "The biggest strength of Gentleman, comes from the actors who gave 100% to save the charm of the characters."

"[20] Jeong Ha-eun writing in Sports Seoul opined, "it is perfect for a killing time movie with moderate laughter and fun."