When Avery's friend, an Interpol agent, is murdered by the #1 criminal on the FBI Cyber's Most Wanted List, Avery risks her life to capture the killer, the Deep Web's most notorious and dangerous drug dealer.

CSI: Cyber is a drama inspired by the advanced technological work of real-life Cyber Psychologist Mary Aiken. Special Agent Avery Ryan heads the Cyber Crime Division of the FBI, a unit at the forefront of solving illegal activities that start in the mind, live online and play out in the real world. While other FBI agents search for criminals in dark homes and alleys, Ryan and her team search the "dark net," a place deep in the bowels of the Web where criminals are anonymous, money is untraceable and where everything is for sale with just a keystroke.