The accepted narrative describes the Knights Templar as humble warrior monks defending Christians on the highway to Jerusalem. 
The Knights have been later betrayed and, finally, destroyed.
However there may be one other story inside that story. It is a legend crammed with homicide, thriller, and buried treasure. And it includes a secret highly effective sufficient to rewrite historical past and alter the world.
Sure, the Templars have been in Jerusalem defending Christians. However that was their cowl story.
The actual motive they have been there was: they have been in search of one thing. Historical know-how.
In order quickly because the Knights Templar arrived within the Holy Land, they began digging.
After which….
