Buried: Knights Templar and the Holy Grail

The Knights Templar were the most powerful and secretive fighting force of the middle ages. God's Holy Warriors and legendary defenders of the Grail. Until they vanished overnight. Two former soldiers, Mikey Kay and Garth Baldwin launch a revolutionary investigation using military tactics and tech to solve a 700-year-old mystery. What happened to the Knights Templar? Were they completely destroyed in 1307 as history alleges? Or did they pull off the greatest escape in history and take the Grail with him?