When psychologist Dianne Renzel is found brutally murdered in her own bed, suspicion immediately falls on her husband, law professor Lawrence Usser. An expert in temporary insanity defences, Usser isn''t going to be easy to convict.

Determined to bring their daughter''s killer to justice, Dianne''s grief-stricken parents hire lawyer-turned-private-detective John Marshall Tanner to discover the truth.

But as Tanner digs deeper into Dianne''s murder, assumptions give way to questions, dark family secrets begin to surface and it quickly becomes impossible to determine who is guilty and who is beyond blame...