Edinburgh 1880. When Amy Osbourne's parents are lost at sea, she is forced to leave her London home and is sent to live with her aunt and uncle at the opposite end of the country. Alardyce House is depressing and dreary, her aunt haughty and cruel. Amy strikes up a friendship with her cousin Edward but his older brother Henry is just as conceited as his mother, and a mutual loathing develops between him and Amy. As her weeks of mourning pass, the realisation begins to dawn on Amy that her aunt has designs on her inheritance and the candidate she favours to be her niece's husband fills Amy with horror. Struggling in this strange, unwelcoming environment, Amy begins to suspect that something isn't right at Alardyce House. There are rumours below stairs of a monster on the loose, local women are being brutally attacked and her cousin Henry is the prime suspect. Alardyce House is full of dark secrets and Amy isn't sure who she can trust...