With roots stretching back to the medieval stonemasons and a well-earned reputation for secrecy, Freemasonry is an ancient fraternity shrouded in mystery. Now, as the United Grand Lodge of England (UGLE) celebrates its 300th anniversary, the Freemasons have allowed cameras in for the first time to reveal what really goes on behind closed doors.With unprecedented access, we discover what it means to be a Freemason through the stories of members themselves, from the regalia and the grand ceremonies to charity and the unbreakable bonds of brotherhood. And we ask, just how relevant is Freemasonry in the 21st century?