Long, long ago, two alien races fought a war of extinction. All that is left of either of them are the berserkers: vast, thinking, spacefaring, killer machines whose sole purpose is to destroy all living things. For the first time in all of their history, they have met a life form that has a chance of stopping them. In the cold reaches of space, the berserkers seize a floating laboratory full of human germ-plasm being stored for retrieval and growth...

A futuristic spy novel featuring Jory Yokosuka, a woman photographer serving as a counter-intelligence agent for Earth. Her job is to ferret out android spies sent to subvert our planet.

Harry Silver has already had a lifetime of trouble from ordinary Berserkers, the automated killing machines programmed an age ago to denude the galaxy of life. And now one of these machines has gone rogue—and kidnapped his own family. What worse devilry will a deviant killing machine attempt? How will he stop it? And even if he can, will he ever see his family alive again?