In the Jacobite Rising of 1745, the Young Pretender Bonnie Prince Charlie leads an insurrection to overthrow the Protestant House of Hanover and restore his family, the Catholic branch of the House of Stuart, to the British throne.

Scotland, 1745. After decades of exile, Prince Charles Edward Stuart secretly lands with the purpose of revolting the Highland chieftains against the German House of Hanover, ruler of Great Britain.

In 2009, art detective Dr Bendor Grosvenor caused a national scandal by proving that the Scottish National Portrait Gallery's iconic portrait of Bonnie Prince Charlie, the rebel Stuart who almost seized power in 1745, was not in fact him. Keen to make amends, and suspecting that a long-lost portrait of the prince by one of Scotland's greatest artists, Allan Ramsay, might still survive, Bendor decides to retrace Charles's journey in the hope of unravelling one of the greatest mysteries in British art.