At a prep school, a secret horror begins to unfold as the students begin to die.

Late at night, Woo-hyuk working on writing poems is visited by his ex-girlfriend, Nari. He tries to mellow her out only to find that they exchange misunderstandable words with each other. Recalling their travel to the island "JeBu", they finally find something in common to share. Now Nari asks him to travel to somewhere with her.