Eilean Eadar is a barren, windswept rock best known for the unsolved mystery of the three lighthouse keepers who vanished back in 1919. But when a young man is found dead at the base of that same lighthouse, two detective inspectors are sent from Glasgow to investigate. Georgina “George” Lennox is happy to be back from leave after a devastating accident. That is, until she meets the hostile islanders and their enigmatic priest, who seem determined to thwart their investigation. George’s partner, Richie, just wants to close the case and head home to his family. But he hasn’t heard the wolves howling or seen the dark figures at their window at night. He’s too busy watching George as if waiting for her to break. With the dark secrets of the island swirling around them, George and Richie must decide who to trust and what to believe as they spin closer to the terrible truth.