Martin Padway, 20th-century archaeologist, becomes a reluctant one-way time-traveller, landing in Rome on the verge of the Dark Ages. With no way home, he sets out to make the world he's in a better place. In short order, Padway "invents" and introduces such things as Printing and newspapers, Arabic numerals, Double entry bookkeeping, Copernican astronomy, and, most important -- Distilling. And the world of decaying Rome will never be the same!