A boy named Shogo landed on the island. He approaches a man making a raft on the beach and tries to help him with the work. The subtle air that flows between the two. They seem to know each other well, but they are also like others. The truth behind a marine accident three years ago then became clear. A child went out on a raft to the sea and went missing. The man was the father of the missing child, and Shogo was a close friend who made a raft with the child.