Donna is stunned when the police turn up at Mill Cottage and reveal that Rosemary's blood was found on her handbag and they suspect foul play at work. Grayson looks at Rosemary's diary entry for the day she disappeared and it mysteriously says 'MK – MF'. The police suggest that 'MK' could refer to Matthew King and they head off to interview him, but a cocky Matthew comes up with an alibi. Later, Grayson punches Matthew and demands to know what he's done to his mum! Marlon perks up when Ross's girlfriend Kirsty turns up and he hopes that the couple will repair their failing relationship. But Kirsty seems bored when Ross and Donna start discussing work and Marlon worries that Kirsty isn't going to be the answer to his problems. Marlon is even more despondent when Kirsty admits that her relat