Two British agents (John Steed and Emma Peel) team up to stop Sir August De Wynter from destroying the world with a weather changing machine. British Ministry agent John Steed, under direction from "Mother", investigates a diabolical plot by arch-villain Sir August de Wynter to rule the world with his weather control machine. Steed investigates the beautiful Doctor Mrs. Emma Peel, the only suspect, but simultaneously falls for her and joins forces with her to combat Sir August.