Synopsis: Earth is under attack by the Mysterons and one man holds the key to survival - Captain Scarlet!
During a mission to Mars in 2068, agents of earth's Spectrum security force start an interplanetary war when they destroy the ancient city of the Mysterons, an invisible race with the ability to assume the form of any object or person they destroy. But their attempt to take over Spectrum's top agent - Captain Scarlet - fails, and he becomes their most powerful and implacable enemy.