The BAU team travels to New Orleans to track a serial killer who is again killing men throughout the city after a 15 month break.

New Orleans officials believed that the serial killer that haunted the streets of the city was killed in Hurricane Katrina since the murders ended. With all of the case files and evidence missing in the hurricane's aftermath, Hotch, Gideon and the team have only one clue to go on -- a single word, "Jones," written on the wall of the lead detective's office just moments before he died in the flood waters. Meanwhile, Reid struggles with the aftermath of being taken hostage and meets up with an old rival.