Aviators Howard Hughes, Charles Lindbergh and Amelia Earhart are pitted against The Red Baron, his younger brother, and the Princess Irini Lvova in a daring race to fly around the poles for a $50,000 prize

When, in 1942, the magnetic skyliner, City of Santa Barbara, begins receiving radio messages from the other side of the sun, Jack Northrop concludes the signals are from Counter-Earth and plans an expedition