DS Dawson and PC Mason go to Australia to find out what happened to Rosie. They are joined by Carol Cassidy who wants to search for her brother whom she has never met. Dawson and Mason locate Rosie's and Mick's last employer Mrs. Patterson. She sacked the young couple after Mick beat up Rosie in a row, and nobody has seen the young girl after she left town on the bus the following day. But Mason has a feeling that not everybody is telling everything they know. Back in Aidensfield Sergeant Miller has some questions for Mick who is still in the area. Meanwhile Carol finds out that her brother is called Daniel, and she puts an ad in the paper. This puts her in contact with a Doctor Cunningham who claims to know Daniel, but the doctor also has ulterior motives.

The search for Rosie continues. Mick MacDonald is no longer a suspect since PC Mason and DS Dawson have discovered that another young blonde woman - like Rosie - has disappeared in the area. All of a sudden, Carol Cassidy - also a blonde - has disappeared too. And to top it all, a stranger turns up in the town asking for her.