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
Park Gang-du
Byun Hee-bong
Park Hie-bong
Park Hae-il
Park Nam-il
Bae Doona
Park Nam-joo
Ko A-sung
Park Hyun-seo
Oh Dal-su
The Monster (voice)
Lee Jae-eung
Se-jin
Lee Dong-ho
Se-joo
