Zachary Flynn is off to Ireland to escort an old friend, Sean O'Riley, home to Rhode Island after a bout of illness in the land of his birth. Zach has no idea he'll be coming home with far more than old friends. While Zach doubts that murder was intended, he must accept the possibility, since Sean's business partner has gone missing. Caer, a woman with an agency in Ireland, knows that Sean's life is in danger, and she takes on the role of Sean's nurse to stay close to him. Zach doesn't trust her anymore than he trusts the third partner in the sailing and charter business, his wife, the cops, or the man in the moon.
But if Sean is to make another Christmas, especially after receiving a strange gift in the mail, he knows he has to find the truth behind the mist that comes in the night, and the strange whispers of ancient Ireland that tease him in the darkness.