MARLIN BOULET (Anthony Anderson, "The Departed," "The Shield")是重案行動組一位性急的、滑稽的、總是喜歡當著別人的面嘮嘮叨叨指手畫腳的老警察。他的搭檔在颶風來臨之時拋下他獨自逃生去了，Boulet卻留下來堅持崗位，從洪水中搶救落難者，同時維持社會秩序。他對壞人從不心慈手軟，有時行動過激，他也從不低頭認錯。
Boulet 的新搭檔TREVOR COBB (Cole Hauser, "The Break-Up," "ER")在加入紐奧良警隊之前曾在阿富汗戰場服役。他作風強硬，為人忠誠，但是Boulet對他卻感到不太舒服，因為他隱藏著一個黑暗的秘密。 Cobb來到紐奧良是為了尋求救贖，但是這條救贖之路卻危機四伏。
It's been two years since Hurricane Katrina ravaged New Orleans and a select few still remain at the NOPD. These special cops are bound and determined to bring back the life to New Orleans, otherwise known to most as K-Ville (Katrinaville), and clean up the crime and damage that still remains.
Marlin Boulet, a veteran of the NOPD's Felony Action Squad, was left stranded in the waters by his partner, but still attempted to keep some little bit of order to all the chaos that was going on during the hurricane. He now has a new partner with ulterior motives, Trevor Cobb, who is fresh back from a tour of duty in Afghanistan. Together the two work the streets of New Orleans, trying to make it a better place. Helping them on their crusade are fellow officers Jeff Gooden, Captain James Embry, Billy Faust, and the lone female officer, Ginger LeBeau.
