Retired Louisiana detective Rodie Sanchez is reinstated to solve a cold case that has haunted him for almost 20 years -- the murder of Eugenie Boisfontaine, a woman who was dumped in a bayou and left to decompose for months. With the help of modern forensics, Rodie may finally have what he needs to find her killer.
With DNA results shifting their focus, the detectives turn to Eugenie's neighbors who reveal they watched her walk around late at night, possibly putting herself directly in her killer's path. They also meet with retired forensic anthropologist Mary Manhein to develop a more concrete profile of their suspect and gather insight on the type of weapon the killer may have used.
The detectives track down witnesses who may have been the last ones to see Eugenie alive, and Major Ronnie Hebert and Detective Lori Morgan run forensic tests on a possible murder weapon. Then, Rodie Sanchez's home life and the struggles he faces are explored.
Detective Lori Morgan looks into a cutting edge DNA technology that could be the key to seeing the face of Eugenie's killer. Then, as the team reaches a dead end, a witness they interviewed in the past comes forward with new information.
After receiving a tip, Detective Aubrey St. Angelo sits down with a convicted felon. Meanwhile, Detective Rodie Sanchez tries to rekindle the relationship with his son and the team continues their efforts to speak with Eugenie’s ex-husband.
The detectives narrow their focus to a few possible leads and obtain a subpoena for an interview. Then, Rodie is in danger of leaving the case and breaking the promise he made to Eugenie’s mother.