Corruption grows within the Stones of Luna, jeopardizing all the Lands of Lunamoor. Harlow is safe in the Kingdom of Shadows, nursing her jagged heart but avoiding her sister. Sensing her reluctance to mend fences, Shade gives her a time limit to put herself back together and step up to become the warrior she's always meant to be. But when Bloom returns, bearing an urgent message, Harlow has no choice but to put her grievances aside and learn...