Murder and mystery loom in the air of Patrick Hamilton’s Victorian thriller. Set in the fog-bound London of 1880, mysterious things have been happening in the Manningham household: items go missing, their dog is injured and Bella Manningham hears footsteps coming from the locked, uninhabited top floor.

As Mrs Manningham begins to doubt her own sanity, Inspector Rough appears. Is Bella really losing her grip on reality, or is there something altogether more sinister happening…?