1918: The Great World War Had Run Its Coursenear The German Front Two Desperate Boys Risk Everything To Stop Their Father'S Execution By Secretly Completing The Work On His Experimental Biplane... A Biplane That Could Alter The Course Of War In Germany'S Favor. With The Help Of Three Young Cousins Hans And Jules Embark On The Adventure Of A Lifetime In A Thrilling Scheme To Demonstrate The Fighter'S Aerial Superiority To The German Luftwaffe But The Boys Troubles Only Increase When A Cantankerous Old Convict Moves Into Their Home With His Beloved Menagerie Of Animals. Humor Adventure And Camaraderie Blend Together With Heroic Courage To Unite The Boys In A Common Cause. In This Epic Tale Of War Sixteen Year-Old Hans Steiner Flies The Mysterious White Machine Into Battle Above The Skies Of France.