It's 1943, and World War Two is raging across Europe and around the globe. Seventeen-year-old Robbie McWilliams can't wait to follow in his father's footsteps and enlist in the Royal Canadian Air Force- he wants to become a Spitfire pilot and fight for his country. The only problem is that he's still too young to join. So with a little help from his best friend, Chip, Robbie devises a plan that will allow him to enlist early and keep it a secret from his mother, from his schoolmaster, and most importantly from the authorities at the RCAF.
Using the birth documents issued to his older brother who died in infancy, Robbie joins the air force and begins his training in Brandon, Manitoba. He aces his classes and shows all the makings of a great spitfire pilot, but is dealt a huge blow when he's assigned to train as a navigator on a Lancaster. Soon he's on his way to England, where he completes his training on treacherous missions bombing German targets in enemy territory, all the while wishing he were training to be a pilot. One of his bombing missions goes awry, though, and Robbie is about to learn that you should be careful what you wish for...