Lilly investigates the 2000 murder of a bank teller, who was gunned down during a robbery by thieves wearing Johnny Cash masks and carrying sawed-off shotguns, after the same bank is hit again by robbers wearing similar masks and equipped with identical weapons. The probe reveals that the victim may have known her killer. Back at headquarters, a man from Lilly's past shows up and wants to rekindle their relationship.

A man who calls himself John Doe comes into the station and tells Lilly that he abducted and buried a 17-year-old boy alive in 1980. At first, Lilly doesn't know whether to believe him or not. But after she realizes he is telling the truth, she comes to a horrific conclusion: the man has abducted another victim, who may still be buried alive.