Three cases from The First 48 with puzzling motives. In Tulsa, a woman is brutally attacked as payback for someone else, then, in Dallas, a barber is gunned down by someone who greets him as a friend. And finally, in Atlanta, a man sticks up for a friend and becomes the target.

Examines three cases where homicides were committed in the name of love. First, in Dallas, a couple is shot to death on their doorstep, and detectives have to track down the killer as he goes on a multi-state crime spree. Then, in Louisville, a hearing-impaired man is stabbed in his doorway. And finally in Tulsa, a woman's body is found in a trash can. Can her death be linked to the murder of her fiance the year before?