Imperial Intelligence Agent Brion Bayard was catapulted into nothingness by an unknown force and woke to find himself in a universe not his own. Surrounded by hulking, cannibalistic ape men who called themselves Hagroon, Bayard was soon entrapped in a web of time lines. He found himself running from the Hagroon into the arms of Dzok, the educated monkey man of Xonijeel; transported by Dzok to a universe where Napoleon the Fifth was in power and left there to the tender powers of the beautiful witch Olivia; struggling with the bonds of a fictitious past, always striving to regain his lost universe of Zero-zero Stockholm so he could bring the warning which might save his world from sudden, violent death…

It seemed as though the world was eroding right under everyone’s feet. Stories disappeared from magazines; the baron’s silver coat of arms, polished in the morning, was pitted with corrosion by afternoon; toadstools were springing up from every corner. And these were but the first signs of the coming plague, a cancerous orgy of patternless vitality seeking to engulf the world. Carefree Johnny Curlon, indelicately plucked from his fishing boat one evening, is bluntly informed by high powers that he is a man destined for a role in great affairs: only his unique powers can prevent the coming probability crisis that threatens to turn the world into bubbling chaos

Brion Bayard, once of our own timeline and now Imperium Agent extraordinaire, had been on some pretty dangerous missions before - but never had he encountered so noxious a foe as the invading legions of giant plague-ridden rats who walked like men, spreading disease across the multiple universes of the Imperium. Unless Bayard can travel to the original world of the long-tailed invaders and stop the plague at its source, the Earth of the Imperium and all the other Earths in all the universes will fall before the verminous hordes from a timeline that should never have existed in the first place