Suspended high above a dying Earth at Space Station Delta, the light ship Altares readies to launch for mankind's first intergalactic mission to the stars. Neighbouring Alpha Centauri is the destination for the crew of five comprised of the Masters and Bowen families, whose aim is to bring back hope to an overcrowded and desperate planet. But almost from the moment they launch, the crew finds itself in mortal jeopardy. Pilot Harry Masters is captain of the juggernaut running on cutting edge, experimental engine tech. Anna Bowen brings a devastating secret aboard that threatens the future with her husband Tom and son David. And Jane Masters, Harry's daughter and co-pilot of Altares, wakes at the centre of a terrifying mystery that chases the crew to Alpha Centauri and beyond - all the way to infinity. Based on the classic Gerry Anderson made-for-TV movie, written by Johnny Byrne.

The light ship Altares and her crew plummet through the maw of a powerful black hole and emerge in a strange new universe. Running low on fuel and in need of repairs, Captain Harry Masters pilots the spaceship into orbit around an Earth-like planet. But before the crew can make planetfall, they must first attempt a dangerous maneuver to reach the towering gas clouds at the limit of the star system in order to refuel. In the plumes, the crew encounters the first of many mysteries - a silent alien colossus with clues that point back to the blue world. On the planet's surface, navigator Tom Bowen, Jane Masters, and David Bowen discover the remains of a city and proof of visitations by more than one advanced race, while aboard the light ship Doctor Anna Bowen experiences a ghostly reunion with a face from the past. Soon, the crew of Altares find themselves trapped between the malevolent alien force roused from slumber beneath the city and preparing for war in orbit, and a dangerous enemy from the Earth itself bent on seizing control of the light ship so far away from home.