Dr. Eldon Chance resolves to help Jaclyn Blackstone, a woman with a second personality, escape her abusive, crooked cop husband with the help of a dangerous, Nietzsche-quoting, antique furniture restorer known simply as D.

Chance investigates Jaclyn's last psychiatrist and a secret rendezvous with Jaclyn forces an ominous encounter.

As Jaclyn continues her therapy, Chance attempts to protect himself and his family from Blackstone’s latest round of harassments.

Chance and D begin surveillance of Blackstone, hoping to get hard evidence of his corruption. Chance’s desire to help Jaclyn veers into obsessive, making him question the mission and his own sanity.

Chance undergoes a brain scan in a bid to find a medical explanation for his uncharacteristic behavior. Meanwhile, Blackstone arrives to deliver a beatdown, and Chance teams with D to incriminate Blackstone, but their in-the-shadows mission turns deadly.

Awaiting the fallout from their last mission, Chance fears for his family’s safety. During a night alone with Jaclyn, Chance suspects his patient may not be as helpless as he believed.