Bullied at school and ignored and abused at home by his indifferent mother and older brother, Billy Casper, a 15-year-old working-class Yorkshire boy, tames and trains his pet kestrel falcon whom he names Kes. Helped and encouraged by his English teacher and his fellow students, Billy finally finds a positive purpose to his unhappy existence—until tragedy strikes. A working-class English boy spends his free time caring for and training his pet kestrel.