All Maura wants is a peaceful winter holidays in her Irish castle, but her ex is threatening her with family court, and her second grader has invited a strange—completely unclothed—friend, to spend the holidays with them. Oh. And the friend’s dog, which is not actually a dog but probably one of the white deer of Celtic myth.

When a fifth century pagan priest is unearthed in Ireland fifteen hundred years after being entombed, archaeologist Caitlin O’Connell is convinced it’s the find of the century. The body is in perfect condition, right down to the intricate tattoos adorning the Celt’s skin. In fact, if scientific data hadn’t proved otherwise, she would swear he hadn’t been interred more than a few hours.