Rumour has it that Louis XVII was imprisoned in a windowless cell until he died of TB at the age of ten. His heart was then spirited away by a royalist surgeon after the autopsy and hidden in a crypt at Versailles. After many years the heart has now been found and DNA testing confirms its royal heritage. But some claim that the heart in fact belonged to Louis the seventeenth’s brother. They believe that the young heir to the throne was smuggled from his cell at the height of the revolution and lived happily ever after in Holland. We take you for a fascinating journey to unravel a mystery that’s developed over two centuries.