It is an age of pain an dwonder; on Earth, struggling from the ravages of nuclear war;on Thistledown, the amazing asteriod-starship from the far future; and in the Way, the infinite corridor that slices across universes both human and inhuman. But now an impossible visitor from the end of Time comes to take a handful of voyagers into space-time, where they must destroy the ultimate marvel of science. For the existence of the Way threatens to abort the ultimate goal-and purpose-of all creation...