PRINCESS RANI has heard the whispers: Snake Princess, they call her. A girl with fangs for teeth. Her people fear her. Yet her father doesn't believe her capable of ruling. RIA is the quickest thief this side of the Var River-that's why she's still alive. But when she's conscripted into a looming war, she knows she has to be quicker than ever before to elude the royal army's grasp. These two lives collide, turning everything upside down ... because Ria and Rani, orphan and princess, are unmistakably identical. A deal is struck—both can get what they want if they switch places for less than one moon's time. But danger lurks in both worlds, and the two are thrust into a race to unravel a mysterious prophecy and locate a long-lost mythical object. To save their home, thief and royal must work together—or watch it all fall into ruin.