Roberto della Griva finds himself washed up on an abandoned ship in a harbor 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 ma