After her adventures in Murder on the Cliffs, young Daphne du Maurier travels to a remote island off the coast of Cornwall to visit the estate of Lord and Lady Trevalyan. Somner House, enchanting amidst lush exotic wilderness and only a moment's walk to the sea, beguiles Daphne, but just as looming winter storms begin to envelop the island, the Lord is found murdered while the Lady is found in the arms of a lover. Even Daphne with her torrid imagination could not have dreamed that she would become ensnared in the vile, villainous schemes being hatched within the walls of Somner House—or that a handsome stranger would inspire her to plumb the depths of a great mystery.