Monica has finally managed to seduce Frank, but he dare not tell Sheila that he and Monica have been sleeping together despite his promises to his wife. Sheila proves to be a frightening adversary when scorned, and Frank could be in danger. Neither Sheila nor Monica is willing to share him, so Frank must decide which wife he wants; the future of his family depends upon his decision. Meanwhile, tragedy strikes the Maguires when Jamie's past crimes lead to the brutal murder of one of his brothers, sending Paddy and Shane on the path of revenge against the family's rival. Can Jamie prevent a turf war? Elsewhere, there's a tough new PC on the beat in Chatsworth, Carrie Rogers (Amanda Ryan), and she takes an instant dislike to most of the residents.