First in a thrilling series from cybercrime expert Daniel Scanlan. FBI Special Agent Ericka Blackwood chases a deadly online predator – and nothing is as it seems. He's online. He's anonymous. He's deadly. When a video surfaces on the dark web showing a murder no one else could have witnessed, FBI Special Agent Ericka Blackwood must race to catch the killer. But the case is even darker than Ericka thought. Hidden behind an avatar named Dantalion, a criminal mastermind is feeding his sadistic appetites by directing the crimes of others – and he may have been orchestrating his schemes for years. As Ericka's investigation homes in on her target, the tables are suddenly turned. Dantalion knows that she is obsessed with tracking down the men who destroyed her sister's life, and has information that will enable her to find them. To exact her long-awaited revenge, Ericka will have to risk her career, her life, and the fate of Dantalion's future victims. But does vengeance come at too high a price?