Battle lines are drawn when Martha and Clive find themselves on opposing sides in a high profile case of assisted suicide. A mother is accused of helping her severely paralysed daughter to die and Martha must fight to defend her client in a test case amidst the moral arguments that surround such a contentious subject. As Clive and Martha represent either side of this fractured family, tensions between them rise to the surface that threatens their own relationship. Meanwhile Billy’s position becomes ever more compromised.