How well do you know the person you love? A woman's body is washed up on the rocks by the castle ruins in St Andrews with evidence of strangulation, and no ID. Two days into the case, a call from another woman claiming to be the victim's friend could be DCI Andy Gilchrist's first solid lead. But when she fails to turn up for an interview, Gilchrist fears the worst. The next day, they find her battered body. Gilchrist's focus...