Anton wakes on a dead red plain with half his mind gone and no idea who he is. A small grey robot dog stands over him, patient as the dust, holding a single tablet in its jaw. Good morning. You have one item of correspondence. Delivery is logged.
The correspondence is a warrant. It bears his own name - Anton V, unit five of five - and it charges him with nothing less than the end of the world.
As each day's dispatch peels back another layer, Anton recovers a hundred centuries of buried memory: a laboratory dug down toward the Earth's molten heart, where his team found a people who were not quite people - advanced, gentle, hollowed out, calling themselves the Three. A reincarnation engine fused to a machine that folds time. A wife he stole across the ages and learned, too late, to love. A golden civilization drowned at the dawn of history and dragged screaming back into the light. And, beneath all of it, a single unbearable question he has spent every life refusing to answer: why, when he has sworn over and over to end suffering, does he reach every single time for the knife?
He has been a god, a prisoner, a healer, a murderer, and the most honored mind his species ever produced. Now, in the ruins of a paradise he built and burned, with a hunter's light crossing the plain to collect him at last, Anton has one final chance to do the one thing he has never once managed in a hundred centuries - and discover what the door was truly for.
A haunting, time-spanning meditation on guilt, free will, and the terrible difference between helping a world and forcing it, ATON V asks whether a man who has only ever destroyed can, just once, choose to save - even when it costs him everything, and saves no one but the ones he loves.
