The Berserkers are the ultimate war machines, designed to roam the galaxy and eliminate all signs of life the find. Their next target: the planet Sirgol, the only spot in the universe where time travel is possible. Their strategy: to go back to the past and kill Vincent Vincento,an early scientific genius whose death will cost mankind a hundread years' worth of science.

Their adversary: Derron Odegard, an elite Time Operative whose orders are to protect Vincento. He faces the toughest assignment in the history of the galaxy, on that may cost him his life -- no matter what the outcome.