Class 1-9

What begins as an ordinary school excursion to a remote, northern province of South Korea takes a harrowing turn when Se-yeon and her classmates are suddenly stranded on an isolated island off the coast of North Korea. Cut off from civilization and thrust into a hostile environment far beyond their control, the students quickly realize that their familiar world has vanished. The unforgiving landscape and the terrifying geopolitical reality of their location leave them entirely without hope of immediate rescue. As desperation sets in, the fragile social structures of the classroom begin to collapse. Driven by hunger, fear, and the sheer will to endure, these young people are forced into making unthinkable choices. The extreme circumstances strip away their innocence, pushing them toward brutal measures just to see another day. In this merciless fight for survival, alliances fracture, and the line between victim and aggressor blurs, leaving one haunting question: who among them will ultimately survive, and who will succumb to the devastating reality closing in around them? This series explores intense mature themes, including depictions of bullying, self-harm, suicide, and graphic violence. Viewer discretion is strongly advised.