In the remote South Korean village of Hope Harbor, police chief Bum-seok and officer Sung-ae are assigned to investigate a mysterious creature causing chaos and fear among the local residents. As they dig deeper into the strange incidents, they begin to realize that things are not always what they appear to be. Misunderstandings, fear, and human conflict gradually fuel a chain of devastating events, setting the stage for an unimaginable catastrophe that reaches far beyond the village.