From the leader of a Norse raiding party in 7th-century England to a young symbiotically bonded Pilot-and-Ship in the far future. From a female German scientist during the Second World War to a member of an alien race who communicates by smell. From the past to the future, war is coming. And only a few can see the darkness.

Hidden at the centre of the Universe, the darkness spreads its tendrils throughout space and time. Those it touches become puppets, dedicated to slowing down the improvement of the human race and preventing it from reaching its true potential. For the darkness knows that when it makes its final invasion of our space, humanity will stand against it.

And in the far, far future, knowing that they are the last hope for the galaxy, the Ragnarok council is forming...