Biggles is missing. Fearing that this may be the result of a failed mission, Algy, Ginger and Bertie demand answers from Air Commodore Raymond.
Raymond informs them that Biggles' last known whereabouts were in Monaco, on a solo mission to rescue an Italian princess. Whilst protecting the princess as she boarded a plane, Biggles was shot. He hasn't been heard from since, and is believed dead.
With Raymond's permission, Algy, Bertie and Ginger set off in search of Biggles, determined to find him. The three friends parachute into southern France and then split up, each covering different ground in their individual searches across Europe.
Without their leader, can Algy, Ginger and Bertie successfully complete their mission? And even if they find him, is Biggles still alive?
A desperate quest for a fallen friend across wartime Europe.