1923. In the heart of an old English college, Edward Williams receives an engraving of of an unknown country house with an imposing facade, a sweeping lawn - and, just perhaps, something else.

• BBC
• Can Do Productions
• Rory Kinnear
• Robert Bathurst
• Frances Barber
• Nikesh Patel
• John Hopkins
• Emma Cunniffe
• Tommaso Di Vincenzo