Abner Marsh, a struggling riverboat captain, suspects that something's amiss when he is approached by a wealthy aristocrat with a lucrative offer. The hauntingly pale, steely-eyed Joshua York doesn't care that the icy winter of 1857 has wiped out all but one of Marsh's dilapidated fleet; nor does he care that he won't earn back his investment in a decade. York's reasons for traversing the powerful Mississippi are to be none of Marsh's concern--no matter how bizarre, arbitrary, or capricious York's actions may prove. Not until the maiden voyage of Fevre Dream does Marsh realize that he has joined a mission both more sinister, and perhaps more noble, than his most fantastic nightmare--and humankind's most impossible dream.