Police Detective Devereux Gautier knows he's no hero. He's seen too much and failed too many times. Now the homeless kids he mentors are dying and the only person who can help him find the killer is the woman who dug up his past to destroy him. Dev needs her help to solve the case, but he can’t trust her and he can't trust himself around her, because she's the sexiest, most intelligent woman he's ever met. Journalist Reghan Connor knows there are no heroes, and she's out to prove it on the air for all of New Orleans. Her latest debunked hero is Detective Dev Gautier, who hates her for exposing his mistakes. Now Reghan has been given the key to the murders of Dev's homeless teens, but how can she convince him she's not setting him up for another fall? As they work together to solve the murders, Reghan learns that being a hero is complicated and loving a hero can be downright deadly.

New Orleans Police Detective Rick Easterling is no saint: he's the NOPD's best undercover cop. Known as the Man of a Thousand Faces, he's a rogue ­– breaking the rules to solve cases his way. When his brother dies of a drug overdose and Rick is suspected of being a dirty cop, the detective vows to clear his name and avenge his brother's death. Rookie police officer Lusinda Johnson has a personal axe to grind with dirty cops. When she volunteers to work undercover to shadow Rick, she tells herself his sexy, brooding bad boy demeanor doesn't fool her, but the longer they work together, the harder it is to see him as anything other than a hero. As “Sin” and Rick investigate the corrupt underbelly of New Orleans night life, they find that their lies imperil them both as much as the drug lords closing in. Will they learn to trust each other in time to save themselves and their growing feelings?

Alexandra Tyler is on the run. She married her college sweetheart, but soon discovered a dark side to him that she'd never seen before. Hoping to find refuge and start a new life, she moves to New Orleans. But bad luck follows and she finds herself barely escaping an abduction. Before she knows it, she's entangled in the search for a serial killer. FBI Special Agent Danny DeLuca is on the trail of an infamous serial killer. There have been nine victims in nine months, one during each New Moon. But the tenth victim, Alexandra Tyler, escapes, giving Danny the first break he's had in the case. His job is to protect her and catch the killer, but as danger closes in, Danny must guard his heart in order to keep her safe. While the killer continues to commit the almost perfect crime, Danny and Allie are forced to work together, while also resisting the other's charms. If they give in to their escalating attraction, it could be the death of both of them.