When a prominent Florida optometrist is bludgeoned to death in his home, Melbourne police must investigate claims of self-defense; the evidence trail leads them to a young witness who reveals a wicked murder plot.

After a welfare check is called in on a 53-year-old Texas man, police soon discover him shot to death in a Louisiana swamp that's 450 miles from his home; detectives devise a sting operation to track down his killer and reveal a vengeful murder plot.