Crown Prosecutor Helen West, feeling frustrated and angry, decides that her life needs brightening up. Where better to start than her home and who better to help her than Cath, her newly acquired cleaning lady? Cath is a treasure and her life could do with brightening too; she is mourning the death of her brother and is also ensconced in a less-than-perfect marriage. Helen turns a blind eye to Cath's unhappiness until, as the paths of her professional and private lives collide, she becomes a witness to the destructive forces of love and guilt and finds herself applying her own version of justice.