Leo, an inmate at Blackstone prison, meets with his sister's lawyer, Natalie. She updates him that his sister is safe, but his legal case is complicated by a witness changing their story. Meanwhile, prison doctor Adrian Gray observes Natalie, making Leo suspicious. He directly confronts the doctor, accusing him of watching Natalie and threatening him to stay away. The doctor denies it and gives Leo a medical order, which Leo refuses. Leo decides he must keep watch on the doctor, who now seems to have a dangerous interest in his lawyer.