Haunted by fragmented memories and a haunted past, a former CIA assassin continues his quest to uncover his identity while remaining a target of the agency that once trained him. Despite his amnesia, he pieces together clues about his past and discovers connections to a top-secret operation known as Treadstone. With new intelligence in hand, he travels from Moscow to Paris, Madrid, and London, relentlessly seeking to uncover the truth about his history and the people responsible for his brainwashing and transformation into a lethal weapon.

As the protagonist digs deeper into his past, he must also outmaneuver the CIA officials intent on silencing him. His pursuit for answers is hampered by a new government program called Blackbriar, designed to eliminate threats to national security with even fewer scruples and oversight than Treadstone. With an investigative reporter and a disillusioned agency operative as his unlikely allies, he strives to evade a trained assassin on his heels and officials who will stop at nothing to keep their secrets buried. His journey is fraught with danger and the revelation of betrayal as he edges closer to the truth, questioning who he can trust in a world filled with deceit and covert agendas.