While waiting for a train to Haewon, an isolated Korean seaside village, bodyguard Mu-young gets a disaster alert on her phone. TVs throughout the station report breaking news of a massive earthquake on the eastern coast. Despite the danger, Mu-young boards the train with her niece: she’d rather face the earthquake than leave the girl in her mother’s care. That choice haunts her for the rest of her life.

Three years later, Haewon Village is home to horrors. The earthquake unleashed an ancient plague that transforms its victims into fishy monsters, and the government’s lockdown has cut off any hope for help. Mu-young’s niece is dead, and all that’s left for her is to hunt villagers who break isolation. When an officious bureaucrat from Seoul arrives in the village, he stirs up even deeper ...

While waiting for a train to Haewon, an isolated Korean seaside village, bodyguard Mu-young gets a disaster alert on her phone. TVs throughout the station report breaking news of a massive earthquake on the eastern coast. Despite the danger, Mu-young boards the train with her niece: she’d rather face the earthquake than leave the girl in her mother’s care. That choice haunts her for the rest of her life.

Three years later, Haewon Village is home to horrors. The earthquake unleashed an ancient plague that transforms its victims into fishy monsters, and the government’s lockdown has cut off any hope for help. Mu-young’s niece is dead, and all that’s left for her is to hunt villagers who break isolation. When an officious bureaucrat from Seoul arrives in the village, he stirs up even deeper ...