Once upon a time there were two sisters. They were created by beings called the Grace. Both sisters had magic powers. When they were together, they could do anything. Go anywhere and when. Reach into people's minds, even influence their thoughts. They tried to be good. They tried to do what was right. But they failed...PART ONE: THE EDGE. There's a hotel on a cliff overlooking the sea. All sorts of people wash up there. Zara arrives at the hotel searching for her sister Abby - but after all they've been through and fought over, will she want to be found? PART TWO: THE BATTLE. August 9th, 991 AD. Abby and Zara are on the Essex coast in the rain, searching for a man they loved and lost. But future history has already been written. They're about to find out how much more they can still lose...PART THREE: Once upon a time there were two sisters, created by beings called the Grace. There are lots of stories about the two sisters. But their last story, about the day they chose to die...Those who knew what really happened are all dead. Except for one. CAST: Ciara Janson (Abby), Laura Doddington (Zara), Paul Copley (Dennis), Sunny Ormonde (Miss Simone), Tim Bentinck (Albert), Joe Coen (Kurt/Olaf), Geraldine James (Chi), Tim Chipping (Burtnoth), Lisa Bowerman (Archive), Fraser James (Marek), Michael Cochrane (Brondle), Joanna Van Gyseghem (Wing).