Det. Superintendent Jane Tennison's (Helen Mirren) relationship with psychologist Patrick Schofield (Stuart Wilson) has developed into a promisingly happy affair. When a series of murders take place which resemble those investigated in the first Prime Suspect she is faced with a possible miscarriage of justice and promptly suspended. Are they copy-cat crimes or is George Marlow (Tim Woodward) innocent as he always insisted? Prevented from working possibly betrayed by her lover and haunted by the past Tennison is forced to re-examine her most fundamental beliefs about her life and work.