Following the dumping of gallons of toxic waste in the river, a giant mutated squid-like creature appears and begins attacking the populace. Gang-du's daughter Hyun-seo is snatched up by the creature; with his family to assist him, he sets off to find her.
- Genre: Horror, Drama, Science Fiction
- Studio: Cineclick Asia, Happinet Pictures, Showbox, Tube Pictures, Seoul Broadcasting System, Chungeorahm Film, IMM Venture Capital, Boston Investments, CJ Venture Investment, Cowell Investment Capital Co., Knowledge & Creation Ventures, M-Venture Investment, OCN, Sego Entertainment
- Keyword: river, monster, bravery, archer, daughter, sewerage, pollution, formaldehyde, snack bar, family, asian origins, seoul, south korea
- Cast: Song Kang-ho, Byun Hee-bong, Park Hae-il, Bae Doo-na, Ko Asung, Oh Dal-su