A teenage girl is captured by a giant mutated squid-like creature that appears from Seoul's Han River after toxic waste was dumped in it, prompting her family into a frantic search for her. Song Kang-ho, Byun Hee-bong, Park Hae-il, Bae Doona, Ko A-sung, Oh Dal-su, Lee Jae-eung Added on Amazon Prime 2023-07-27. Youtube Trailer