Hyeong-do (SO Ji-sub) goes to the office every day, but isn't thrilled with the cubicles, the politics, his co-workers, or the management. His job is murder. Literally. At this company, death is all in a day's work. Hyeong-do is a corporate assassin, working for a company specializing in contract killings. He's one of the best, and a loyal employee. But when his new trainee gets killed on the job, he feels an obligation to care for the kid's family - and taking his eye off the ball is not how a guy gets promoted. Now, Hyeong-do wants out of the cutthroat rat race to start a new life, but his colleagues have different plans - and retirement may come at a far bloodier price than expected.