Charlie Harris and his wife, Helen Louise Brady, have arrived in Ireland for their honeymoon. After a few days in Dublin, they head to County Clare, ancestral home to Helen Louise's extended family, the O'Bradys. Her cousin Lorcan runs Castle O'Brady as a bed-and-breakfast with his wife Caoimhe and their daughter and son-in-law. But upon arrival at the castle, the newlyweds are shocked to see a body falling from the roof.

The dead man is centenarian Finn, Baron O'Brady, Lorcan's grandfather, which means that Lorcan now becomes the new Baron O'Brady. Was someone in a hurry for Lorcan to assume the title and ownership of the estate? Or is there another reason for wanting Finn dead? And why is a ghostly cat making an appearance in their room-is he trying to warn them? Charlie and Helen Louise must answer these questions and more as they realize the local garda can't solve the crime alone. And along with Diesel they will have to investigate themselves or risk something wicked coming their way...