Plague has filled the emerald hills of Wee Neill, and the young midwife's father has only months to live. To save people, Sorcha makes a deal with dangerous fairies. She must cross the sea, past the lands of the merrows and kelpies, to find the forgotten king on the crumbling throne.

Born to be the king of the Seelie fae, Eamonn fought to maintain honor and freedom... until his twin brother plunged a sword into him in the back. Crystals grew from the wound, cutting through skin and bone. His people banished him to a cursed island for being ugly, and he now rules over criminals and fools.

With the help of Brownie and Pixie, Sorcha tries to break through his crystal shell and convince him to take back his stolen throne. This determined beauty may even steal the heart of this monster.