Cowering in fear of the Devastator death-god, the simple folk of the desert planet Muspel worship a prophet who fell from the sky. He prepares them for the final battle, predicting that the Devastator will send terrifying agents of destruction... the Strontium Gods!
But high-priest "Omega" is really fugitive conman Oswald Mega, ready to resist arrest with an army of fanatical followers. The Devastator's power is merely the side-effect of a terraforming project by Muspel's sister-planet Midgard. And the four horsemen of the apocalypse are a Viking on vacation, a Scot with a lumpy chip on his shoulder, a small white furry thing... and Johnny Alpha, played by Shaun of the Dead star Simon Pegg!.
The Search/Destroy agents have just 24 hours to find Omega before the reward is open to all-comers. But the trail goes cold on Midgard, and time is running out. It's Alpha versus Omega... with Floods, Famine, and Fire from Heaven!
This story takes place in 2176 AD, in the 'classic' Strontium Dog continuity - and before the Big Bust of 49 storyline (2000 AD Progs 416 - 424).