In the middle of a tropical storm one night, these characters are among the passengers it carries: Fay Benton, a single mom and cocktail waitress desperate for something to go right for once; Johnny and the Contusions, a ship's band with so little talent they are . . . well, the ship's band; Arnold and Phil, two refugees from the Beaux Arts Senior Center; Lou Tarant, a wide, bald man who has killed nine people, though none recently; and an assortment of uglies whose job it is to facilitate the ship's true business, which is money-laundering or drug-smuggling or . . . something.