Jonathan Smythe has launched his invasion of Freya, and in one swoop, he has killed a queen and taken her heir apparent, Prince Thomas, hostage. Now Captain Kate must partner with Thomas' fiancée, Princess Sophia, and her longtime ally, Dalgren, if they hope to save Tom from his fate as a puppet king propping up a tyrant. Meanwhile, Henry, the former spymaster to the Freyan throne, has gathered what allies he can in a desperate attempt to remove Smythe from his beloved country, and he may have to turn to the help of his former enemies to pull it off.