Overview
Inside Men is a 2015 South Korean political action 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, Cho Seung-woo and Baek Yoon-sik, it began filming in July 2014 and was released in theaters on November 19, 2015.
Inside Men and the director's cut Inside Men: The Original have sold a total of 9.1 million admissions at the box office, thus becoming the top grossing R-rated movie of all-time at the Korean Box office.
Plot
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.
From Wikipedia (CC BY-SA 4.0).