The team investigates when Aaron Gibbs ends up missing one night and soon learn that he had been lying to his wife about quitting his job, and had been working nights in a fight club. During the course of the investigation, Jack and the others learn that Aaron's disappearance was connected to events that took place during Hurricane Katrina, when Aaron was fighting to save his sons, and follow the trail of evidence, believing that the events of that night in New Orleans hold the key to finding the truth about the missing man.