What does it mean to be human? How far would you go to reach someone you loved? Malcolm Enright has spent his life trying to communicate with his son, Ajax, a chimpanzee he and his wife raised from birth. A renowned scientist, Enright crosses ethical lines by developing Evolzamin, a human-enhancement serum made up of a cocktail of nanobots that successfully forges a link between man and creature, only to find out that inside Ajax is a cold, calculating killer without a shred of empathy. Desperate to protect his former wife from a rampaging Ajax, a distraught Enright forcibly injects Evolzamin into an FBI agent named Oliver Carson and then commits suicide. Falsely accused of murdering Enright, and with a strange drug inside him, Carson must go on the run with Enright’s dog as his companion and find answers to the changes he’s experiencing. As the Evolzamin drug takes holds, Carson is worried he’s losing his mind, as he and the dog seem able to communicate with each other, while odd physical changes also take place with him. Along the way, Carson must relearn what it means to have hope, to feel something other than loss, and to believe in something good about himself.