Long after his humiliating defeat at the hands of Earthman Elijah Baley, Keldon Amadiro embarked on a plan to destroy planet Earth. But even after his death, Baley's vision continued to guide his robot partner, R. Daneel Olivaw, who had the wisdom of a great man behind him and an indestructible will to win.

In this gripping continuation of the famous Robot Series, the universe's future hangs in the balance. The once powerful Spacers may have weakened, but the desire for revenge and destruction remains strong. Dr. Kelden Amadiro is determined to bring total annihilation to Earth, but Lady Gladia vows to stop him at any cost, sealing the fate of Earth and all who live there.