Bass Rock home to a brooding fortress precipitously perched on the rocky island guarding the Firth of Forth and gaol to incarcerated Jacobite prisoners. In the summer of 1691 four Jacobite soldiers, led by the intrepid Humphrey Craddocke surprised the governor and guards and drove them out of the castle. The English Government placed the island and fortress under siege. For almost three years the defenders repelled any attempt to retake the Castle and played one of the most astounding games of bluff in history. Can they survive and escape with honour as free men? A minor epic of Scottish History!!