On a bright September morning in 1939, two days after Britain has declared war, a group of privileged but desperate people gather in Southampton to board the largest, most luxurious airliner ever built - the Pan American Clipper, bound for New York: an English aristocrat, fleeing with his family and a fortune in jewels; a German scientist, escaping from the Nazis; a murderer under FBI escort; a young wife running away from a domineering husband; and a handsome, unscrupulous thief...