Caledonia Styx let down her guard once – and her family were murdered by ruthless warlord Aric Athair and his blood-thirsty Bullets. Now captain of a crew of girls who have lost everything to the Bullets, she has sworn never to show mercy again. But when a rogue Bullet saves the life of Caledonia’s best friend, she faces an impossible choice. If she lets the boy live, could he help them bring down Athair – or will he destroy them all?