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.
Jo Dae-yeong is a police officer investigating a pickpocket ring with ties to the Yakuza. One day he rescues Baek Jang-mi from danger, only to discover that she is the boss of the gang he has been tracking.
Su-young, a police detective who went to prison for someone else, is surprised when a mysterious woman named Yoon-sun arrives to collect her on her day of release. As she discovers that the promised compensation for her time behind bars has vanished, Su-young embarks on a mission to reclaim what rightfully belongs to her.
