Inside Men (Hangul: 내부자들; RR: Naebujadeul) is a 2015 South Korean political thriller film written and directed by Woo Min-ho based on Yoon Tae-ho's webtoon The Insiders that dissects the corruption within Korean society. Starring Lee Byung-hun, Jo Seung-woo and Baek Yoon-sik, it began filming in July 2014 and was released in theaters on November 19, 2015.
Lee Kang-hee, an editor at an influential conservative newspaper, raises congressman Jang Pil-woo to the position of leading Presidential candidate using the power of the press; behind this is his secret deal with the paper's biggest sponsor. Ahn Sang-goo, a political henchman who supported Lee and Jang, gets caught pocketing the record of the sponsor's slush fund, resulting in a dismembered hand. Woo Jang-hoon, an ambitious prosecutor, starts to investigate the relationship between Jang and the sponsor, believing that it's his only chance to make it to the top. While getting down to the brass tacks of the case, Woo meets Ahn, who has been methodically planning his revenge. Now the war between the one blinded with power, the one hell-bent on vengeance, and the one eager for success begins.