Exiled to Jamaica after the Battle of Culloden in 1746, Sir John Wedderburn made a fortune, alongside his three brothers, as a faux surgeon and sugar planter. In the 1770s, he returned to Scotland to marry and re-establish the family name. He brought with him Joseph Knight, a black slave and a token of his years in the Caribbean. Now, in 1802, Sir John Wedderburn is settling his estate, and has hired a solicitor's agent, Archibald Jamieson, to search for his former slave. The past has haunted Wedderburn ever since Culloden, and ever since he last saw Knight, in court twenty-four years ago, in a case that went to the heart of Scottish society, pitting master against slave, white against black, and rich against poor.