When can a citizen become a killer? Is homicidal insanity ever a moral or legal justification for murder? And what should a jury do when the facts are clear but they don't tell the real story? Cape Cod attorney Marty Nickerson, until recently a Massachusetts prosecutor, must ask herself those questions in her new role as defense attorney for client Buck Hammond. The charge is murder one. When Buck's seven-year-old son was raped and killed by pedophile Hector Monteros, Buck took justice into his own hands. Unfortunately, the TV cameras were rolling as Buck aimed his hunting rifle at Monteros's head. The only viable defense is insanity, but the grieving father refuses to say he was crazy when he pulled the trigger. Marty, teaming with Harry Madigan, her partner in love and law, has a tough case. How can the jury acquit Buck when the shooting is right there on the screen for all to see?