There's no end-of-tunnel light staring down the barrel of a gun. It's final, like death and taxes. It's that existential moment that made Grace review her life choices.

Dr. Grace Sykes leads a structured life and runs a comfortable psychiatry practice. Everything has a precision and order to it - except her marriage.

Until Sylvia DeSoto slinks in. From the first session, Grace can only guess at Sylvia's true intent. A broken and disturbed girl, Sylvia is a formidable adversary. Not words Grace normally uses for her clients.

As Grace's sessions with Sylvia continue without direction or improvement, Grace's own life begins to spiral. Or is it all in her head?

Grace thinks she's met with a challenging patient. She thinks she knows her husband. Can she figure it out before her life ends with a bang?"