Balmoral Castle, 1905. For Rose McQuinn, a handsome cottage on the Royal estate promises a summer holiday of unaccustomed luxury. As Rose travels by train with her little stepdaughter Meg and her trusty dog Thane, she wonders what exciting adventures await them at the Royal household. The holiday takes a darker turn when Rose is warned not to interfere in two deaths that occur soon after her arrival. When they’re dismissed as accidents, she suspects foul play. When the sinister tide of events moves closer and threatens her own family, Rose is determined to track down the killer lurking among the sportsmen – a killer whose aim is to bring down more than just the game birds.