The descendant of adventuring—dead—aristocrats, Clarissa Knightley supplements a modest inheritance by penning gothic novels that cost more than they earn. Upon learning that she has mysteriously inherited a share of an earl's estate, she rashly packs up her household. In remote Gravesyde Priory, she hopes to find a safe haven and family who will welcome her and her young nephew.

Instead, she discovers a drunken American army captain, his African servant, and ancient, surly caretakers. Terrified, prepared to flee, Clare is lured to linger by the prospect of secret diaries, hidden jewels, and an increasingly intriguing man. Then a killer strikes.

The crumbling manor's ominous and baffling history offers fascinating fodder for Clare's horror novels—if only she can survive real-life madmen and a spectral murderer who may seek the jewels at any price.