Abigail Foster fears she will end up a spinster, especially as she has little dowry to improve her charms and the one man she thought might marry her - a longtime friend - has fallen for her younger, prettier sister. When financial problems force her family to sell their London home, a strange solicitor arrives with an astounding offer: the use of a distant manor house abandoned for 18 years. The Fosters journey to imposing Pembrooke Park and are startled to find it entombed as it was abruptly left.