Iberia Parish's Sheriff Detective Dave Robicheaux, Tommy Lee Jones, is pulled into a murky case when a young woman is found murdered and the quiet town nervous with fear. In a twist of fate, he crosses paths with Peter Sarsgaard as Elrod Sykes and Kelly Macdonald as Kelly Drummond, a Hollywood duo in town to film a Civil War-era movie. Elrod’s reckless driving raises immediate questions about his sobriety, and Dave arranges to take him in, only to be reminded that the case is never that simple: Elrod claims to have found a decayed corpse in the swamp alongside Kelly, a clue that might connect the murder to something older and deeper in the marshlands.
Dave’s memory drifts back to a teenage incident—a chained prisoner shot in the swamp and vanished into the bog. The thread begins to pull him toward a string of recent killings in the same rough region: young runaways and prostitutes whose deaths echo that long-ago trauma. The trail leads toward John Goodman as Julie “Baby Feet” Balboni, whose mob ties have soured Dave’s relationship with the town’s underworld and shaped their entanglement as enemies. Balboni vehemently denies any knowledge of the murdered prostitute and, as the case tightens, a film site becomes a place where truth and illusion blur. The producer, John Sayles as Michael Goldman, confirms that Balboni is funding the film but insists he is not a co-producer, despite Balboni’s own claims.
Meanwhile, Dave’s personal life spirals into the drama. Bootsie Robicheaux, Mary Steenburgen, the wife he loves, watches with concern as Elrod and Kelly drift into his orbit, showing up at his door far too often. Dave understands the pull of alcohol—the same battles his own daughter, Alafair, Alana Locke, watches with a mix of admiration and worry as she looks up to the glamorous outsiders. Bootsie’s worry grows, and the film’s lure—Hollywood glamour—casts a long shadow over the Robicheaux family.
The case escalates when a second body appears, drawing in the FBI. Dave teams up with agent Rosie Gomez, Justina Machado, and their partnership adds a professional urgency to the pursuit. A birthday celebration for Goldman becomes a turning point: Dave, trying to stay sober, drinks Dr Pepper and ends up in a daze behind the wheel. A car crash sends him into a foggy, dreamlike forest where Confederate soldiers, led by a mysterious General Hood, seem to offer guidance. When he wakes in the hospital, Gomez explains that his drink had been laced with LSD, a crucial piece of the puzzle that reframes his earlier visions as both a symptom and a clue.
The plot thickens as Elrod and Kelly sail out onto the bayou. In the rain, Dave lends his coat to Kelly, only for a gunman to shoot her, mistaken for him in the gloom. Hood’s presence persists, offering advice and a peculiar sense that the past wants to be solved through the present. The specter of Hood loosens its grip as Dave confronts his own guilt and the fragile balance of his sobriety. Elrod, meanwhile, moves in closer as Dave becomes his Alcoholics Anonymous sponsor, a role that forces him to confront his own weaknesses while trying to protect those he cares about.
Tragedy deepens when Dave’s close cop friend Lou Girard, Pruitt Taylor Vince, is found dead, and the investigation seems to point toward someone who knows the local terrain and its dangerous secrets. Hood’s final presence on the scene is a poignant, almost ceremonial moment: a group photograph on the edge of departure, with Hood inviting Dave to join them in a keepsake that frames the detective’s journey as both a battle and a voyage.
A crucial breakthrough arrives from a different angle: a pimp’s testimony helps to corroborate the suspect Murphy Doucet, Bernard Hocke, while Doucet’s partner Twinky LeMoyne, Ned Beatty, emerges as a key link to a skeleton found in the swamp—DeWitt Prejean. Dave makes a bold arrest using a planted knife as evidence, but Doucet secures bail and retaliates by abducting Dave’s young daughter, Alafair, Alana Locke. The suspense intensifies as Gomez and Dave converge on Doucet’s campsite, where Gomez, acting on instinct, shoots Doucet. Dave ensures her safety by planting a throw-away pistol on the unarmed suspect, clearing her of the charge and recovering Alafair.
With Doucet in custody, months pass and the truth about Hood blooms in the aftermath. Dave realizes that Hood’s storied image was not a living figure but a manifestation of his own need for guidance during the case. The community breathes again, Elrod’s life shifts toward sobriety, and Bootsie’s faith in Dave’s judgment steadies the family as they navigate a quieter existence. Elrod finds a silver lining for his own redemption, giving Alafair a small role in the Civil War film and declaring that she saved him in more ways than one.
In the final beats, Alafair pores over a Civil War book and stumbles upon a photograph that reveals Hood and his soldiers standing behind the men in the frame. The anonymous, haunting presence Dave thought he encountered is now captured in a single image—Dave appears among the Confederate ranks, the result of a journey that blurred memory and reality but ultimately brought a sense of closure to a case that tested every fiber of Dave Robicheaux’s courage, his conscience, and his capacity to move forward. The closing image ties the entire story together: the past and present, fear and faith, violence and mercy, all converging in a single, timeless landscape of the bayou.
