Maggie Sheridan (Mirren), once one of the most famous blues voices of her generation, lost decades of her life to drinking and hard-living. After a failed suicide attempt, she was taken in by Sir Charles Stafford (Iain Cuthbertson, Antonia and Jane) and his son Sebastian (Iain Glen, Tomb Raider). She has lived quietly on their Irish estate for ten years. But one summer evening, her peaceful life is shattered when Sir Charles is brutally murdered, and a valuable sixteenth century painting is stolen. The painting is one of several disturbing pictures sent to Sir Charles marking the major events in his life.

Maggie is convinced that the stolen painting holds the key to Sir Charles' death and decides to track it down. Meanwhile, Sebastian uncovers a terrible secret, with horrific consequences.