It could just be coincidence. It could also be revenge.Hardened cop Frank Zimmerman doesn't believe in coincidences. Neither does FBI profiler Nathan Thomas.A drowned lawyer, a fatal car accident, and a socialite's lethal fall in front of a huge crowd all have their cop antennae pinging - hard.They dig for evidence to support the theory of a trail of bodies that lead into the past.What's going on? And who will die next?