Her niece is abducted and her in-laws disappear. Long-deceased agents turn up in garages across the city - dead again. No wonder SSA Ellie Iverson's internal alert goes off the scale.

Enigmatic clues and codes from a missing colleague and brother-in-law about the seepage of sensitive FBI data, lead to the sudden death of a team member and leave Delta A spinning. Two new agents, with special talents akin to Ellie's, join the team and ramp her alarm sensors even higher. Her niece's social media life offers clues to a horrifying network and its activities.

Working under a directive from the Director of the FBI and with the Wayward Son Protocol, Ellie and Delta A work to disentangle leads from the darknet, stem the flow of death, and bring her family home.

Ninth in the –byte series, Cat Connor delivers another mind-bending thriller.