By coincidence, Bill lost his memory, Sharp holds on to a heroic desire, their personalities are completely different, but they are attracted to each other by 2 boys. He encounters a miracle on an isolated island in the sea. The boy did not know, but this strange "Bloody Island" has unique and cruel rules. A game of survival to the last man is played out. A fierce battle is played out because of the boys who are trapped in the sea by one tragedy after another. I wonder if there is some unknown danger waiting for the two people who are attracted to each other......