The defendant - David Marquette. Devoted husband and father.

The victims - His own family.

The plea - Not Guilty by Reason of Insanity.

But the State suspects Marquette's insanity defence is being fabricated to disguise murders that were cold-blooded and calculated. Worse, it believes Marquette may be a suspect in a string of unsolved homicides, which would make him one of the most prolific and elusive serial killers in Florida's history.

The trial will take young prosecutor Julia Valenciano on a painful personal journey back to a past she has struggled for fifteen years to forget. And it will bring her face to face with a future that is so frightening, she's not sure she ever wants to face it.