Just outside Earth's atmosphere lies Skybase, a vast floating aircraft carrier that's headquarters to an international security group called the Spectrum Organization, tasked with maintaining peace on Earth.
Two scientists are replicated by the Mysterons as assassins infected with a disease that can kill with just one touch. Scarlet and Blue are pitched into a hunt against the clock to find them – but the Mysterons have a trick up their sleeve.
An alien spacecraft crashes into the Australian desert. Spectrum investigates, and Scarlet is offered a chance to stop the war with the Mysterons before it even starts.
Scarlet and Black agree an uneasy truce when they find themselves trapped and must work together to escape an icy grave – but just how much can Scarlet trust his one-time friend turned mortal enemy?
When scientist Phil Bogart disappears with a matter disrupter bomb, Scarlet and Blue have to rely on a telepathic link with his brother Frank to find him. But Frank Bogart is a convict with his mind set on escape.
Trapped aboard Proteus, a state of the art stealth warship controlled by the Myterons, Scarlet, Colonel White and Lieutenant Green have to evade being caught by a pack of deadly robots and stop the aliens triggering a new world war.
Vulcan Industries breaks the UN exclusion order on Mars and sends a maintenance team to its closed-down Martian operation. When Scarlet leads a team to bring them back, its survival is put in Destiny's hands.
Angels Destiny, Harmony and Melody are stranded on a tropical island for 24 hours, but paradise soon turns sour when they find themselves being hunted by Mysteron-controlled pirates.
Scarlet and Blue track a rogue Russian Druzynik tank into Alaska and discover an entire town that's been taken over by the Mysterons. Then Scarlet is forced to make a life or death choice between his friend and the future of the entire human race!
Destiny and Lieutenant Green are taking a vacation at Serendipity, an artificial beach resort in a lunar biosphere but Scarlet uncovers a plan to destroy it – and finds himself caught in a duel for survival on the lunar surface with Captain Black.