Rodion Meglin is a brilliant, eccentric senior investigator who operates outside the standard protocol to capture Russia's most dangerous serial killers. Utilizing unorthodox psychological methods and a deep, tortured understanding of the criminal mind, Meglin works entirely alone until he takes on a young, enigmatic intern named Yesenia Steklova. As Yesenia assists him in solving a series of brutal homicides, she begins to realize that Meglin's genius stems from his own dark inner demons, and she must uncover his ultimate secrets before it's too late.