A South Korean Navy helicopter vanishes during a ROK-U.S. joint military exercise and crash-lands on a deserted island where time and space have collapsed. There, the crew encounters soldiers lost ten years earlier and comes face-to-face with the entity known as "It." To return home, they must survive and uncover the truth.

A South Korean Navy helicopter vanishes during a ROK-U.S. joint military exercise and crash-lands on a deserted island where time and space have collapsed. There, the crew encounters soldiers lost ten years earlier and comes face-to-face with the entity known as "It." To return home, they must survive and uncover the truth.