The year is 1643. Roberto, a young nobleman, survives war, the Bastille, exile and shipwreck as he voyages to a Pacific island straddling the date meridian.There he waits now, alone on the mysteriously deserted Daphne, separated by treacherous reefs from the island beyond: the island of the day before.If he could reach it, time - and his misfortunes - might be reversed.But first he must learn to swim...