The end of life throughout the galaxy was months - or days, or minutes - away. When the last of the mysterious entities known as the Calebans died, so would all those who ever traveled by a Caleban "jimpdoor" - and the jumpdoors were the universal means of travel, with every intelligent being on every planet using them constantly.

(Key Words: Fiction, Science Fiction, Frank Herbert, Jumpdoor, Calebans).