Joe just can't get the case of the murdered woman out of his head and is convinced there's something sinister at play, with his paranoia leading him to suspect that one of his patients may know something about the killing. Meanwhile, Ruiz and Devi are hunting for new evidence in their case when a surprising breakthrough turns the spotlight back onto Joe, whose marriage is then hit by a bombshell.

Joe is knocked sideways when an old grudge rears its head and with the police closing in, he flees to his dad's house for sanctuary. Ruiz has a nagging doubt that he is missing something - he just can't put his finger on it, while Joe must dig deep into his own past to understand what is happening in the present.