A Dallas-based FBI agent is doing his job investigating the murder of a serial killer. When he is told to close the case he realizes something isn't right and continues to investigate. Through his investigation the agent, Thomas Mackelway, learns that it may be a former FBI agent that is killing the serial killers looking for revenge. Everything is elevated when Thomas suspects that the former agent is going after Suspect Zero, a killer responsible for hundreds of murders and the most wanted killer in the FBI.
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