It is the story of a 17th century Italian nobleman who is the only survivor of a shipwreck during a fierce storm. He finds himself washed up on an abandoned ship in a harbour through which, he convinces himself, runs the International Date Line. Although he can see land, his inability to swim leaves him marooned and he begins to reminisce about his life and his love. He becomes obsessed about his allegedly evil twin brother, who is split from his own persona through a process reminiscent of the doppelganger effect, and thus accusing him of all the bad things that happened in his life. The brother takes blame mainly for his bad choices and is present to sweeten the disappointments of life . Through this reminiscence he becomes convinced that all his troubles will end, if only he can reach the land. The story is told from the point of view of a modern editor who has sorted through the man's papers. Exactly how the papers were preserved and eventually handed down to the editor remains a point of conjecture.

Umberto Eco (born January 5, 1932) is an Italian medievalist, semiotician, philosopher, literary critic and novelist, best known for his novel The Name of the Rose (Il nome della rosa, 1980), an intellectual mystery combining semiotics in fiction, biblical analysis, medieval studies and literary theory. Recently his 1988 novel Foucault's Pendulum has been described as a "thinking person's Da Vinci Code,"and was re-issued by Harcourt in March 2007.

Eco is President of the Scuola Superiore di Studi Umanistici, University of Bologna. He has also written academic texts, children’s books and many essays.