The film tells the story of a man who was washed ashore on an uninhabited island after a ship wrecked by a storm, and after twelve years, he returned to human society.

嵐で船が難波し、無人島に漂着した男が、十二年の歳月を経て、再び人間社会に生還するまでを描く。吉村昭の同名の原作の映画化。