Something isn't right at Guardian Castle, and Aine can't figure out what. As Healer, she's supposed to be making things better, but there's a darkness that can't be brightened. And then Aine finds an injured Fomorian-winged, dark, blood-thirsty and inherently evil. Or is he? Because there's something about Tegan that Aine can't resist…and once they've shared blood, Aine realizes that everything...