Billy Casper, a 15-year-old working class Yorkshire boy, is a scrappy loner who delivers papers before and after school, shares a bed with his bullying brother, Jud, and mostly ignores his self-absorbed mother. His routine is derailed when he spots a small falcon, a kestrel, in the countryside. He's raised birds in the past and is inspired to capture a young kestrel and try his hand at falconry. When not enduring the scorn of his peers and "betters,"...