There's a prize of $50,000 for the first team to fly across the bottom of the world. It's the mid-1920s - but it's a very different world. For one thing, the Kaiser started the War in 1912, and it only lasted a year (there was no Russian Revolution). For another, the world is doughnut-shaped - and no one actually knows what lies through the hole in the middle. Superstitious souls believe the bottom of the world is the location of Hades. The Germans are sending up the Red Baron, his brother Lothar and the Princess Irina Lvova of Russia. In the US, The Spirit of San Diego is being prepared for flight - by Howard Hughes, Charles Lindbergh and Amelia Earhart. Little do they know what awaits them on the other side of the most bizarre alternate Earth ever imagined.