Winter has arrived in the town of Windermere, and has bought with it the death of Frances Henderson, the best friend of Persimmon 'Simmy' Brown's mother. Having known the Henderson family all of her life, Simmy must cope with the loss of an important figure from her childhood, as well as the confusion at being bequeathed something in Frances's will.

When Frances's husband is violently murdered in his home, Simmy must face the fact that the family she was once so close to as a child, holds some dark and sinister secrets.