Ben Tracey is having a well-deserved, restful week of birdwatching with his cousin, Annie when they witness a man in an RAF uniform shoot one of the beautiful Hen Harrier birds dead. When, later that day, they meet an old man full of conspiracy theories about the nearby RAF training base they're curious to know more and creep into the base — Spadeadam. But little do they know that they are in serious danger . . .