An eccentric scientist, Professor Mannfeldt, presents a bold theory that vast reserves of gold are hidden on the moon. Initially dismissed by his peers, he is approached by a young entrepreneur, Wolf Helius, who sees potential in the idea. Helius assembles a team consisting of his confidante Windegger, the brilliant scientist Friede, and his assistant Hans. They plan a groundbreaking expedition to the moon to test Mannfeldt's hypothesis and retrieve the treasure. Complications arise when a group of unscrupulous businessmen learns of their plan and coerces their way into the mission.

The rocket launches with its diverse crew, each member harboring personal ambitions and secrets. As they approach their destination, technical challenges and interpersonal conflicts emerge, complicating their quest. The crew undertakes a perilous lunar landing and sets out to explore the moon’s surface, guided by Mannfeldt’s theories. Initially motivated by the hope of untold riches, their discoveries prompt them to rethink their purposes and relationships.