While the creature is sleeping, Hyun-seo uses a rope she had made from old clothes to get out of the hole. She realizes that the creature has only feigned sleep to lure her out of hiding. She and Se-joo are swallowed by the creature. Gang-du escapes by taking one of the nurses hostage. Nam-il meets a homeless man (Yoon Je-moon) who helps him. The government announces the plan to release a toxic chemical called Agent Yellow into the river, hoping it will kill the creature. Gang-du finds the creature and sees Hyun-seo's arm dangling out of its mouth. The creature goes to the location where Agent Yellow is released and a large crowd has formed in protest. As it attacks the crowd, Agent Yellow is released, which appears to stun it. Gang-du pulls Hyun-seo out of its mouth and sees her still clutching Se-joo; she has died protecting him.