Two cousins ride through the Wild West to track down another cousin who has absconded with their inheritance-a sizeable fortune. One stormy night in the Rocky Mountains the two adventurers meet the famous blood brothers Old Shatterhand the frontiersman and Winnetou the Apache chief. During the night the adventure develops and they come face to face with Tokvi-Kava, a merciless Comanche chief. The cousins join Old Shatterhand and Winnetou on a ghostly night train ride to assist the railroaders in foiling the Comanche's attack on their camp. They are successful and soon the cousins and their newly found friends are on their way to Santa Fe in pursuit of the inheritance. But the Comanche are seeking revenge for their defeat. The Bonanza of Hoaka, located at the Estrecho de Cuarzo and said to contain immeasurable gold treasures, becomes the place for the final showdown between the marauding Comanche and the group of white prairiemen-but the Bonanza is not what it seems.