From NetFlix:

Detective Dave Robicheaux (Tommy Lee Jones) finds himself swimming in a murky sea of corruption, deception and lies when he probes the connection between a rash of murders and a notorious New Orleans mobster (John Goodman) — and discovers secrets that were better left untold. With Robicheaux’s family, and his life, in serious danger, can he stem the rising tide of blood and bring justice back to the bayou?

If it were not for some notable actors such as Tommy Lee Jones, John Goodman, Peter Sarsgaard, and Mary Steenburgen, this ordinary B-film would not be worth watching. The only unusual theme is that Robicheaux is a reformed alcoholic who wants to get Sarsgaard into Alcoholics Anonymous. Better to watch a Law and Order episode.