The Big Easy S01 E19 Lafitte Don't Fail Me Now

"He's the hot cop. She's the cool D.A. When they get together, New Orleans sizzles."

While investigating the murder of a mysterious businessman at a kiddie park, Remy, Anne, and Smiley get drawn into a search for four parts of what appear to be a legendary treasure map leading to a hidden 18th Century pirate treasure in the area which is also sought after by a one-eyed Frenchman who may have a connection to the murder victims, and to a local barmaid who may know more than she knows about the treasure map.