Set in 1890, this is the story of a Pony Express courier who travels to Arabia to compete with his horse, Hidalgo, in a dangerous race for a massive contest prize, in an adventure that sends the pair around the world…

In the Fabulous Thirties, Doc Savage and his five Amazing Adventurers are sucked into the mystery of Doc’s father disappearing in the wilds of South America. The maniacal Captain Seas tries to thwart them at every turn as they travel to the country of Hidalgo to investigate Doc’s father’s death and uncover a vast horde of Incan gold.