Mutual suspicion breeding dreadful fellowship among a handful marooned on a Carribean island by a storm, where dominating Hermione is killed. Orphaned Nonie is torn between loyalty to her fiance, Roy, and the man she learns to love, Jim, as every possibility points to him as the murderer. The situation tightens with the development of the storm and embroils all in another killing. Roy's efforts to save Jim are ruined as he stages the denouement, to free himself and get Nonie. Velvet violence.