Gemma Boyd, an attractive 17-yr old, is found dead at the bottom of a staircase. Although the cause of death was a broken neck, there is little to indicate whether she fell or was pushed. She was found in a vacant house that her estate agent mother and step-father were selling. The autopsy reveals that Gemma had already had a child and was pregnant. The police think that Gemma's boyfriend is their man but when someone else is revealed as the father in the latest pregnancy, Sam thinks there is a far more complex set of relationships at play. Sam's sister Wyn visits ...