Miss Susannah Thorpe is overjoyed when Mr. Harstairs, an old friend from her aunt's past, makes her a wealthy woman by naming her in his will. The only condition is that Susannah has to live in his home for a full month without leaving (and the house is said to be haunted) or else marry within that same month. Upon arriving at the house, she learns it's already occupied.

Oliver Bristow and his friends have been at Harstairs House for several months, since their jobs require security and easy access to the sea. When their nighttime activities bring the militia knocking on the door, Susannah quickly gives Oliver an alibi. Protecting her reputation, Oliver announces their engagement. But when Oliver finally realizes that he really wants to marry Susannah, it may be too late.

HARSTAIRS HOUSE is jam-packed with mystery and suspense. The characters have wonderful attitudes and it's easy to become caught up in the story. If you like easy-reading love stories, this is the book for you.