Following the restoration of a Spitfire that was discovered as an unlikely plaything in a children's playground. The TE517 was built to fight Hitler but then became a pawn in the Cold War, before ending up in the Middle East. Engineers at Biggin Hill in Kent are determined to return her to the air and proudly restore her to her original markings as a member of one of the RAF's legendary Free Czech squadrons.

Engineers fight to prepare a squadron of 10 Spitfires for Britain's biggest warbird air display in years, along with Corsairs, Hurricanes and Mustangs and a dozen more rare warbirds. Technical boss Martin Espin and his team must fault-find and repair against the clock, while display mastermind Jane Larcombe juggles the logistics of an event that involves a small air force and thousands of fans.

Eighty years after it crashed in flames during the Battle of Britain, a rare Spitfire is reconstructed from a wreckage dug from the soil of the South Downs. The mission for modern engineers at the Biggin Hill Heritage Hangar is to make P9372 fly again. In doing so, they honour the pilots of the RAF's most flamboyant fighter squadron whose social life was almost as legendary as their aerial exploits.