Rachel's personal life gets even more complicated when she reveals to Nick that she is pregnant. At work, the team face a particularly gruesome case - a mother of two has been brutally raped and left to bleed to death in the boot of her car. A sharp piece of detective work from Rachel leads to teenager Luke Farrell being charged, but horrific events start to unravel as a result of his arrest. Janet steps up her investigation into her childhood friend Veronica's death and meets up with an officer who investigated the murder.

Après avoir contraint Nick à lui acheter un appartement, Rachel découvre qu'elle est enceinte. Elle piège avec succès le meurtrier de la femme au foyer Susan Metcalfe, mais un sombre rebondissement l´entraîne sur la piste d´un nouveau meurtre. Janet, quant à elle, redoute sa fête d'anniversaire de mariage et poursuit l'affaire concernant l'assassinat de son ancienne amie Veronica.