| Director | Lee Ji-seung |
|---|
An informant contacts journalist Lee Hye-ri (Park) to report that laborers at a salt farm, who have cognitive disabilities, have actually been enslaved. She and cameraman Jo Suk-hoon (Lee) disguise themselves as documentary filmmakers who are interested in salt harvesting and go to the island where the farm is located. They question the local residents but find them secretive and distrustful. As the pair continues to ask questions, a violent attack occurs in which four people end up dead; the salt farm owner (Choi Il-hwa) and his son (Ryu) go missing along with one worker, while Hye-ri is severely injured and ends up in a coma. Detective Choi (Choi Gwi-hwa) and an investigative police officer (Bae Yu-ram) pick up the case.