Let's try not to anger the fair folk again, Daisy. Not on this unseasonably, unreasonably cold Bealtaine's Eve.

Declan Hawthorne drowned six months ago off the coast of the forgotten and fading Irish island of Caillte. He shouldn't be standing on Daisy's cottage stoop now, drenched to the bone from the lashing rain. He shouldn't be demanding to know why this strange American woman claims she's his wife. He shouldn't be thirty years younger than he was when he died.

Who is this impossible young man? A ghost, a time traveler, a hallucination? A horrible prank? Or something worse? Whatever he is, he is just as confused as the widowed Daisy. Declan, Daisy, and their young son Merritt must unravel this mystery before it unravels them. Quickly, now. There's not much time before their incomprehensible truths and darkest fears come out to frolic with the lurking supernatural heart of this island.