Two of Bitterblue’s advisers have perished in a shipwreck. They managed to send a message for Bitterblue before they perished. The message tells her to look into zilfium, a fuel used in the Torlan continent but illegal to use in Winterkeep. She discovers that she’s been swindled out of money when selling materials from her kingdom’s mountains, unknowingly selling traces of zilfiium that are found next to those materials. She’s angered and decides to visit Winterkeep, taking Giddon and Hava with her. She’s swept overboard and her crew thinks she perished. Instead, she’s being kept hidden away from her crew and most of Winterkeep. We meet her kidnappers and see the conditions she’s kept in. An array of characters fills the pages and intrigue turns the story. This latest addition to the Graceling realm adds another interesting culture to this vast world. Spies, loyalty and grief spin a complex riddle, 4 stars!