Matt Connell, a formerly successful literary agent who's been in prison for four years for a crime of passion—homicide by strangulation after learning his wife slept with a friend—receives an early release from Sing Sing to join an FBI undercover investigation of multiple murders in Manhattan. Killings continue to mount as Matt does his best to calm his "Ferrari brain"—a condition in which his mind accelerates wildly into negative thoughts and worst-case scenarios—even as he falls in love with a suspect, then discovers disturbing truths about his past and hers. When he finds his own life in danger, can he stand up for the Bureau's heralded principles of Fidelity, Bravery, and Integrity? Not to mention genuine love?