As Lydia Langstone flees her abusive marriage there is only one person she can turn to - the genteelly derelict Captain Ingleby-Lewis, currently lodging at no 7. However, unknown to Lydia, a dark mystery haunts 7 Bleeding Heart Square. What happened to Miss Penhow, the middle-aged spinster who owns the house and who vanished four years earlier? Why is a seedy plain-clothes policeman obsessively watching the square? What is making struggling journalist Rory Wentwood so desperate to contact Miss Penhow?