The novel is a set in a powerful landscape which became familiar in her later work, with complex clan feuds and mysterious romantic intrigues played out against a backdrop of ruined medieval castles and rugged Scottish coastlines. Each of the characters can be defined by their passions: The present Earl of Athlin, Osbert, is driven by a passionate desire to avenge his father's murder at the hand of Malcolm, the Baron of Dunbayne. His sister, Mary, is ever swooning and fainting in an attempt to resist her passion for Alleyn, a highlander not of noble birth (and therefore unworthy).