In the middle of the 14th century, as if medieval life was not already gruelling enough, the Black Death hit Europe. For three and a half centuries, towns and villages were battered again and again by more than a hundred separate outbreaks. In Europe alone, the estimated death toll exceeded 75 million souls. Then one day, in 1696, it all stopped. Ask a historian today why that was, "...well there were a number of reasons...". No antibiotics, no vaccines, no clean water supplies, no public health programs, no Louis Pasteur, and no nurses or doctors that knew anything beyond guesswork. The truth is, this is where our history books fall silent. What if you were told the reason why the Plague disappeared was a miracle - not a Lourdes miracle, but something much, much more? In the year 2015, news of the death of his grandmother takes Declan O'Leary away from his life in Ireland to his ancestral home in Brittany. An attempt on his life followed by a brutal kidnapping, soon uncover his family's involvement in a legend steeped in mystery and a secret as old as the dawn of time: a secret someone would kill for.