Dr. Alan Strauss, a therapist mourning the death of his wife, takes on an enigmatic new client. As the two men wrestle with very different, individual problems, their professional relationship is transformed by a choice that binds them deeply together.
Sam delves more deeply into the reason he entered therapy, but he encounters resistance from Dr. Strauss as he attempts to continue their sessions. A gathering sense of not being alone leads to a revelation about the house.
On the threshold of crisis, Sam honors the promise Dr. Strauss made him make as a condition for continuing their work together. The trust built between patient and doctor is tested, with a life in the balance.