Martha and Clive find themselves on the opposing sides of a high profile assisted suicide case as a mother is accused of helping her severely paralyzed daughter to die. Martha has to fight for her client ignoring the moral arguments surrounding the case. Billy's position becomes compromised and there's a new opening for Head of Chambers.
Martha is asked to defend a friend from the past and has to put personal feelings aside as he is involved in a gangland execution. Martha and Sean's past comes back to haunt them. Billy receives a visit from a corrupt solicitor.
Martha continues to defend her ex-boyfriend despite overwhelming evidence that contradicts her case. She begins to feel more and more isolated as an angry Clive confronts her about the holes in the case. Martha soon begins to uncover the lies Sean has told her and has to turn to an old enemy to clear his name. Martha is shocked when the jury finally reveal their verdict. Billy's tribunal comes to a head.