Ambassador Mahit Dzmare arrives in the center of the multi-system Teixcalaanli Empire only to discover that her predecessor, the previous ambassador from their small but fiercely independent mining station, has died. But no one will admit that his death wasn't an accident - or that Mahit might be next to die, during a time of political instability in the highest echelons of the imperial court. Now, Mahit must discover who is behind the murder, rescue herself, and save her station from Teixcalaan's unceasing expansion.

After one great battle, the Architects disappeared. Yet humanity’s fragile peace is brief. For, 40 years later, the galaxy’s greatest alien enemy has returned. This time, the artefacts that preserved entire worlds from destruction are ineffective. And no planet is safe. The Human Colony worlds are in turmoil as they face extinction. Some believe alliances with other species can save them. Others insist humanity must fight alone. But no one has the firepower or technology to ensure victory, as the Architects loom ever closer.

The Laconian Empire has fallen, setting the 1,300 solar systems free from the rule of Winston Duarte. But the ancient enemy that killed the gate builders is awake, and the war against our universe has begun again.

Idris has neither aged nor slept since they remade his mind in the war. And one of humanity’s heroes now scrapes by on a freelance salvage vessel, to avoid the attention of greater powers. Eighty years ago, Earth was destroyed by an alien enemy. Many escaped, but millions more died. So mankind created enhanced humans ­such as Idris - who could communicate mind-to-mind with our aggressors. Then these ‘Architects’ simply disappeared, and Idris and his kind became obsolete.

Lee and Mal went looking for monsters on Bodmin Moor four years ago, and only Lee came back. She thought she’d lost Mal forever, now miraculously returned. But what happened that day on the moors? And where has Mal been all this time? Mal's reappearance hasn’t gone unnoticed by MI5 either, and their officers also have questions. Julian Sabreur is investigating an attack on top physicist Kay Amal Khan. This leads Julian to clash with agents of an unknown power – and they may or may not be human. His only clue is grainy footage, showing a woman who supposedly died on Bodmin Moor.