A fast-paced mystery set in the otherworldly and spy-filled Galapagos Islands in 1938 during the lead-up to World War II. A fugitive New York City cop is on the run from both the law and the mafia after killing a mobster. Trying to make his escape to the Fiji Islands in a boat he stole from his father-in-law, castaway Fred Freiman, a German-American, stops on the Galapagos Islands for replenishment and stumbles upon the body of a beautiful, enigmatic German baroness with a hatchet in her head. The next day the baroness's two strange companions are also found murdered. After finding the bodies, Freiman finds himself trapped into identifying the murderer, or murderers, by a corrupt local official as world and local intrigues and personal passions swirl around him. Early on Freiman meets and falls in love with Ana de Guzman, a young, very wealthy Ecuadorian woman who just graduated from Barnard College and who collaborates actively in solving the tangled mysteries. As he struggles to solve the murders, Freiman also searches for the reality of the baroness, who is described by some as a monster and others as a lost soul. Do sirens sing intentionally to trap sailors or do they sing because it is their nature to sing?