BARCELONA are the greatest football team in the world, the greatest for a generation and possibly the greatest of all time. This is the untold inside story of how the best and most loved football team in the world came to redefine how the game is played. We start with the 2011 Champions League final at Wembley, the game that ended the debate about whether Barcelona were the greatest team in the world and began a new one: are they the best ever? We are inside the winning dressing room and inside the mind of the team's coach, Pep Guardiola. From there, the focus is on each of the iconic personalities of this team, telling its story through them, from their genesis in the late 1980s to their coronation in London: Guardiola; his mentor, Johan Cruyff; Xavi; Andres Iniesta and Lionel Messi, perhaps the greatest footballer of all time.