Chicago PD Lieutenant York Richmond is a 23rd Century man with 21st Century tastes. He has reason to despise the class system that gives all the privilege to Genetic Engineered Individuals while Coders like him get the dregs, but he's a cop who gets the job done. When a GEI toddler is found dead for no apparent reason, he'll do anything to find out what—or who—killed a friend's little girl.
Dr. Kindra B-Zaika is a perfect specimen of her generation, designed for beauty as well as brains. Her very ordered life revolves around her child and her work as the lead geneticist developing future generations of GEI, despite her growing qualms about pushing evolution too far, too fast—until a big, brash, belligerent Coder police lieutenant crashes into her lab, demanding answers.
What could possibly kill a child genetically engineered to survive virtually any threat? And why do the powers that be seem so determined to ignore the danger?
As the case takes them on a deadly hunt for an invisible killer that tangles politics and social justice, York and Kindra discover that the line that separates Coder and GEI is a thin one. If it should even exist at all.