Mister) is a 2010 South Korean neo-noir action-thriller film starring Won Bin and written and directed by Lee Jeong-beom.

Instructed by her lover, Hyo-jeong steals a large pack of opium being sold at the bar where she works and hides it in a camera bag, which she pawns to Tae-sik for safekeeping.

Upon further investigation, the officers discover that Tae-sik was a former covert operative for South Korean Army Intelligence, but retired after an assassin killed his pregnant wife.

Tae-sik goes back to the city and discovers a drug manufacturing plant; in the process of destroying it, he kills Jong-seok and frees the enslaved child workers.

When So-mi falls asleep, Tae-sik asks them to stop at a small convenience store where he buys a backpack along with other school supplies.

During its August 6–8 opening weekend, the film recorded 712,840 admissions, taking the number 1 spot on the box office charts for five weeks straight.

Local heartthrob Won Bin (Mother, Tae Guk Gui) transforms himself into an action hero in writer-helmer Lee Jeong-beom's swift and blood-soaked yarn, about a mystery man who gets caught up in a gang war while trying to protect a child, recalling Luc Besson's The Professional.

[17][18] On August 5, 2020, it was reported that the remake will be produced by John Wick director Chad Stahelski and Jason Spitz with a script provided by Derek Kolstad for New Line Cinema.

[19] A Hindi remake titled Rocky Handsome directed by Nishikant Kamat starring John Abraham and Diya Chalwad was released on 25 March 2016.