Tracker supreme for the Expansion Stabilization Force, Gideon Rhue is ordered to recover Ura Penthe’, a biomech tasked with developing a program to mimic human emotions. There are just a few tiny problems. Ura Penthe’ has uploaded the program into itself and fled the Ex-S Force home base of Prime One. And, as an integral part of the NET—the communication system that links several hundred worlds of the Caspian Empire—the biomech can detect any move he and his symbiot, Mei, make against it.

It’s a race against time to find the biomech, now embodied in the form of a gorgeous, unstable redhead, before Sentriforce, the military arm of the empire, and deadly rival to Ex-S Force, discovers Ura Penthe’s absence and sets off in their own pursuit.