Part 4/9:
Fifteen years later, as he hones his martial arts skills and keeps a journal of his torment, Dae-su cunningly plans his escape. Hope arises when he discovers an unexpected clue—a chopstick slipped into his meal—that he uses to dig toward freedom. However, his escape is thwarted by the reintroduction of gas that sends him into unconsciousness. Upon waking, he finds himself liberated, dressed in a sharp suit but struggling to recall the reality of the world outside his confinement.