Three men and two women encounter a typhoon during a gathering at sea, and a woman named Yi Man goes missing. The remaining four people miraculously escape death, but mistakenly wander into a mysterious no man's zone. Creepy events occur one after another, and companions disappear bizarrely one by one. Under the shroud of fear, the survivors suspect each other. Finally, the truth comes to light: the so-called missing Yi Man is actually a man. Due to an old grudge, he meticulously laid out a plan, utilizing the environment of the no man's zone to create panic and eliminate everyone one by one, staging an escape-style island thriller.