A seemingly normal field trip to Banhyang Island by a group of students takes a nightmarish turn when, one by one, their friends go missing after a series of strange, bizarre, and inexplicable incidents occur. As the students desperately search for their missing friends, they realize that the island is not what it seems; it is filled with dark tragedy and twisted history. Will they be able to unveil the secret of the island and leave unscathed? This is our survival documentary about being stranded on the deadly island of Banhyang, <Banhyang>.