This is the tale of three connecting kingdoms. Limeros is a land of beauty, riches and sunshine. The king of Limeros is basically a good guy but years of quiet and contentment have kept him soft. Auranos is a frigid and icy realm ran by a strict 'religious' King and Paelsia is the kingdom that connects the two. Paelsia is dirt poor. They have one strong product, their grapes which make an amazing wine. Their king hides himself away from his impoverished people. 
 The three are at relative peace until a winemaker in Paelsia's son is killed by a lord from Limeros. Thus begins the chain of events that unfold in Falling Kingdoms. The book is told from many viewpoints. We meet Cleo, the princess of Auranos who comes into possession of a magical ring. She loves her older ailing sister and decides she can find some answers to heal her by traveling into Paelsia where she is wanted for her part in the winemaker's son's murder. Lucia is the princess of Limeros who finds out a dark secret about herself. She also may be the sorceress of a prophecy that claims she will be able to rule the Kindred (elemential magic)/ Her brother Magnus wants nothing more than to be with Lucia and follow in his father's footsteps. From Paelsia is Jonas. He watched his brother be murdered by a cocky lord from Auranos and he wants revenge.