Sally Lockhart has struck a man dead with just three words, sent to her in a message from her father just before he drowned in the South China Seas. But unfortunately, Sally has no idea what the words The Seven Blessings mean. Before long, she is drawn into a mystery filled with opium, secrets from her own past and, at the heart of it all, the Ruby of Agrapur.

Margaret Hale is a southerner from a country vicarage newly settled in the industrial northern town of Milton. In the shock of her move, she misjudges charismatic cotton mill-owner John Thornton, whose strength of purpose and passion are a match for her own pride and willfulness. When the workers of Milton call a strike, Margaret takes their side, and the two are brought into deeper conflict. As events spiral out of control, Margaret - to her surprise - begins to fall in love with Thornton...