The 1950s ocean liner Queen Isabella is making her final voyage-a retro cruise from Long Beach to Hawaii and back-before heading to the scrapyard. For the guests on board, it’s a chance to experience a bygone era of decadent luxury, complete with fine dining, classic highballs, string quartets, and sophisticated jazz. Smoking is allowed but not cell phones-or children, for that matter. But this is the second decade of an uncertain new millennium, not the sunny, heedless mid-twentieth century, and certain disquieting signs of strife and malfunction above and below deck intrude on the festivities, throwing a trio of strangers together in an unexpected and startling test of character.