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.