Here is what the main character, Lee Kang-do (Lee Jung-jin), of this profoundly philosophical film does every day for a living: He wakes up, visits the cluttered workshop of a man who has run out of time on a debt he owes to a loan shark, and demands repayment immediately. If the debtor cannot return the loan (and the astronomically high interest on that loan), Lee forces him to deliberately injure a limb with a drill or press or metal hole punch or whatever industrial piece of equipment dominates the workshop and later collect the money from an insurance policy. The injury must be bad enough to permanently cripple the debtor. This, as you can see, is not a job for a human with a soul. It’s a perfect job for a guy like Lee, who is as cold as a fish, never smiles, lives alone, and masturbates not because it’s pleasurable but because he has to—no one in their right mind could ever love/fuck/kiss a man as cruel as him. One day, a woman claiming to be his mother (Lee was abandoned as a baby) enters his life and begins to follow him. The woman is in her mid-40s, has a sad but pretty face, and is clearly drifting on a sea of some deep emotion. The third act of the film reveals what that emotion is and its terrible consequences. If you are not stunned into silence by the closing scene of this film, you are even more heartless than Lee.