He complains of the poor quality platinum used for his magneto, and is overheard by an escaped Russian exile.

The man tells Tom of a secret platinum mine, deep in Siberia.

Tom organizes an expedition to save the exile and find the platinum mine.

For this adventure, Tom needs to build the Vulture, a special glider that can withstand the high-velocity winds in the vicinity of the mine.

Also, to transport the glider and his friends over the Atlantic, across Europe, and into Siberia, Tom builds his largest airship yet, the Falcon.