Mo has a successful advice column in the newspaper. But when she receives threatening letters and a mail bomb, maybe her advice isn't going over so well. Especially when detectives from the New Orleans Police Department show up to question her about a murder and the method used to clean the crime scene. It looks even worse when Carter and Mo discover she knows the man suspected of killing his wife.

But is he the one sending Mo the threats? Or is it someone from her past life in California? Who wants her dead? With an inept agent on the mail bombing case and the NOPD looking into her life, Mo needs to rely on her Sinful friends for help.