In 2850 AD, Louis Wu is at his 200th birthday party and thinking about how bored he is. The world has become homogeneous — everyone on Earth uses the same language, everything is available everywhere, and all the cities have lost their unique flavor. Life is dull. That’s why Louis Wu is a perfect candidate for the alien Nessus (a Pierson’s Puppeteer) who wants to take a manned spaceship to explore a strange phenomenon in space.
Nessus also recruits a Kzin named Speaker-to-Animals who is a feline alien from a warlike culture,