London, 1944. War is raging across Europe and Hitler's terrifying secret weapons, V1 rockets, transform life into a nightmare. After her mother was killed in an air raid, Anna Cooper was sent to live with her uncle, the Ravenmaster at the Tower of London. Now he too is dead, and Anna must seek help from her estranged father to discover her only chance of fighting back. Commandeering a Spitfire, Anna leads a crew of fearless pilots to intercept the deadly rockets. But Hitler has one final secret weapon, against which there is no defense. At the eve of a devastating war, Anna must confront the ghosts of her past and do what she can to survive in a world forever changed.