Known as Gwoemul, the creature spawns from a formaldehyde spill in Seoul's Han River and, frankly, it doesn't even sound like it would have been a plausible villain in the '50s monster movie boom.

Gang-du works at a food-stand on the banks of the Han River. Dozing on the job, he is awakened by his daughter, Hyun-seo, who is angry with him for missing a teacher-parent meeting at school.