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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.