In an alternate-history version of 1902 Portugal, the country has been divided in half because of differing attitudes to the nonhuman creatures living within its borders. In Northern Portugal, the nonhumans are banned from the Golden City and must remain in their own island territories. Oriana Paredes is a sereia (siren), and she is in the Golden City illegally to spy for her people. As a cover, she works as a companion to Lady Isabel Amaral. When she and Isabel are both kidnapped and trapped underwater to die, Oriana’s heritage allows her to survive. She vows to avenge Isabel’s death and teams up with Duilio Ferreira, an aristocrat with selkie blood and ties to the police. As they investigate the kidnapping, they uncover a much larger conspiracy involving government corruption and dark magic. They also begin to fall in love, but many obstacles stand in the way of their relationship.
I enjoy the historical fantasy genre, and the somewhat unusual setting of early-20th-century Portugal inspired me to pick up this book. I liked the book overall, but the world-building is not particularly strong. There are a few passages of exposition near the beginning, in which the author tries to explain the alternate history, the nonhuman races, and the social structure of the Golden City, but it’s all a little confusing and muddled. People who pick up this book because they want to read about selkies and sirens will likely be disappointed, because the novel doesn’t explore the nonhuman cultures in any real depth. On the other hand, people who like “fantasies of manners” will probably enjoy the book overall, as I did. I found the plot a bit overwhelming, but I liked the interactions between Oriana and Duilio, and I look forward to reading more about them in the sequels.