Gang-du receives a phone call from Hyun-seo. She explains that she is trapped in the sewers with the creature, but her phone stops working. Gang-du and his family escape the hospital and purchase supplies from gangsters in order to search for Hyun-seo. Two homeless boys, Se-jin and Se-joo, after raiding Hee-bong's snack bar for food, are attacked and swallowed by the creature. It returns to its sleeping area in the sewer and regurgitates them. Only Se-Joo is alive. Hyun-seo helps Se-Joo hide in a spot the creature cannot reach.