في عام 2012، يعيد محققو شرطة ولاية لويزيانا راست كوهل ومارتن هارت زيارة قضية قتل عملوا عليها في عام 1995. مع تطور التحقيق في الوقت الحاضر من خلال استجوابات منفصلة، يسرد المحققان السابقان قصة تحقيقهما، مع إعادة فتح جروح لم تشف. يثير القصة التساؤل حول حلاهما المفترض لقضية قتل غريبة تشمل طقوسًا في عام 1995. ولكن مع التحقيق الأصلي الذي يتطور، يكتشف التحقيق الجديد أدلة جديدة تشير إلى وجود شيء أكثر خبثًا مما كان أي شخص قد تخيله.

تحت الضغط للقبض على مشتبه به في جريمة قتل لانج، يحذر كويسادا هارت وكوهل أنهم قد يتم استبدالهم بثلاثة محققين من فريق عمل جديد. يتقدم الثنائي للحصول على وقت إضافي لمتابعة تحقيق يأخذهما من بيت دعارة ريفي إلى كنيسة محترقة. مع تدهور حياته الشخصية بالفعل بسبب العمل، يجد هارت استراحة بعيدًا عن المنزل.

يتبع هارت وكوهل سلسلة من الأدلة من أجل تعقب المشتبه بهما الرئيسي.

يبحث هارت وكوهل عن المشتبه بهما المعرفين حديثًا، ريجي ليدو، صانع الميث الذي قاسم زنزانة زوج ضحية قتل دورا لانج وتخطت عليه مؤخرًا الإفراج المشروط. مع تدهور حياة هارت الشخصية حوله، ينغمس كوهل في هوية إجرامية قديمة من أيام ناركو، حيث يتصل بعصابة دراجين من شرق تكساس يُعرف أنهم يتعاملون مع المشتبه بهما الرئيسي.

يتقاسم هارت وكوهل غنائم القضية المحلولة؛ بابانيا وجيلبو تواجهان المحققين بمعلومات جديدة مزعجة.

يتبع هارت وكوهل سلسلة من الأدلة في محاولة لتعقب المشتبه بهما الرئيسي.

يبرم هارت وكوهل هدنة لاستقصاء سلسلة غامضة من حالات الاختفاء المرتبطة بتعبيرات قتل دورا لانج وعائلة توتل. تُلاحظ ليزا زوجة هار

An overlooked detail provides Hart and Cohle with an important new lead in their 17-year-old case.

The disappearance of a city manager disrupts a lucrative land scheme and ignites an investigation involving three police officers and a career criminal who is moving into legitimate business.

Ben Caspar's autopsy reveals the gruesome details of his demise, and Ray and Ani wonder if it has anything to do with his fondness for prostitutes. Meanwhile, Frank looks into what might have happened to his missing fortune.

The repercussions from Caspar's murder are felt by Frank and the Vinci Mayor's office. Ray and Ani are involved in a close call with the killer.

The detail works a pawn-shop lead to close in on a suspect in the Caspere case. Frank revisits his past to pay for his present. Velcoro, Bezzerides and Woodrugh struggle to keep the case straight in the face of corruption.

Ray and Frank contemplate new life choices. Ani and Paul follow a lead up the coast.

Desperate to locate a missing woman with intel about Caspere, Frank meets with Mexican drug dealers; Ani infiltrates an exclusive inner circle, with Ray and Paul keeping close tabs.

Ray, Ani and Paul take precautionary measures to elude detection and untangle a dark mystery; Frank deals with the fallout of his betrayal.

Frank, Ray and Ani weigh their options as Caspere's killer and the scope of corruption is revealed.

The disappearance of a young Arkansas boy and his sister in 1980 triggers vivid memories and enduring questions for retired detective Wayne Hays, who worked the case 35 years before with partner Roland West. What started as a routine case becomes a long journey to dissect and make sense of the crime.

Hays looks back at the aftermath of the 1980 Purcell case in West Finger, Arkansas, including possible evidence left behind at the Devil's Den. As attention focuses on two conspicuous suspects--Brett Woodard, a solitary vet and trash collector, and Ted LaGrange, an ex-con with a penchant for children--the parents of the missing kids, Tom and Lucy Purcell, receive a cryptic note.

Hays recalls his early romance with Amelia, as well as cracks in their relationship that surfaced after they married and had children. Ten years after the Purcell crimes, new evidence emerges, giving him a second chance to vindicate himself and the investigation.

Hays and West see a possible connection between the local church and the Purcell crimes. As the detectives search for one suspect and round up another for interrogation, Woodard is targeted by a vigilante group.

Wayne finds himself in a no-win situation as new clues emerge in the Purcell case. Roland wrestles with how to keep evidence secure as lawyers demand a new investigation. Amelia finds her relationship with Wayne imperiled by her writing aspirations and his jealousy.

Wayne and Roland revisit discrepancies in the Purcell case that were hidden or forgotten over the years. Among those being reevaluated is Tom Purcell, as well as Lucy Purcell’s cousin, Dan O’Brien. The glitter of Amelia’s book release is tarnished by a voice from the past.

Following up on new leads, Wayne and Roland track down a man who left the police force in the midst of the Purcell investigation. Meanwhile, Amelia visits Lucy Purcell’s best friend in hopes of gaining insights into the whereabouts of the mysterious one-eyed man.

Wayne struggles to hold on to his memories, and his grip on reality, as the truth behind the Purcell case is finally revealed.