Dan Dare and his crew finally return to Earth. Landing in central London, they find the city deserted - or that's how it seems at first. But soon Dare faces an army of ruthless machines, robots who have conquered the planet and placed the surviving humans in slave camps. The robots are too powerful and too numerous to be resisted, and their invasion is complete. With limited resources, Dare, Digby and Peabody face their greatest challenge yet - to liberate planet Earth. But the task becomes more desperate than ever when Dan discovers the alien force behind the robot invasion...