 Sam and Bailey work with FBI field agent Susan Marsh whom is tracking Robert Lee Gregg, a conservative civic leader in Atlanta whom is suspected in the killing of six gay men. But their investigation is happened by Susan s former boyfriend, Richard Russell, whom is stalking her. Susan insists she s in control of the situation, but Bailey thinks otherwise when her boyfriend is found murdered and Russell is a suspect. Things get worse when Russell targets Bailey and his ex-wife Janet whom are now back together. Meanwhile, Sam leaves the investigation and travels to Miami to investigate the disappearance of a local man who may be connected to the Gregg killings, and she finds herself being perused by Detective Mario Monagno whom still wants to date her.