Ten thousand years ago, the ancestor civilisation known as The First was at the height of their power. Then they vanished, leaving behind only abandoned and broken artefacts, and a few scattered populations that sank into barbarism.

Now the survivors have achieved Slipstream travel once more, and are beginning to explore the cluster. However, thousands of years of separate development have changed the people of those worlds, and tensions are rising as cultures clash.

But over everyone’s heads hangs the questions posed by the disappearance of the Firsts’ civilisation and amazing technological achievements. How did they build their incredible legacy? What was the cause of their mysterious disappearance? And could the same thing happen again – is mankind under threat?