Dan Dare, is chosen to fly the Anastasia on its maiden voyage to Venus. What Dan, Digby and Professor Peabody find on Venus is a cold-hearted ruler, the Mekon. A creature destined to become Earth's greatest threat.
Unable to return to Earth, Dan Dare, Digby and Peabody head to the desolate planet Mars to discover Dan's estranged Uncle Ivor has woken an army of deadly insect-creatures that threaten to swarm and engulf the Earth.
When a distress call summons the crew of the Anastasia to the burning wilderness of Mercury, they discover the exiled Mekon is rallying his forces, plotting a desperate revenge against his former homeworld of Venus.