The incredible story of how three men born south of Glasgow within 30 miles of each other, grew up to become lifelong friends and three of the most influential men in football history. Matt Busby, Bill Shankly and Jock Stein lead their clubs Manchester United, Liverpool and Celtic from the doldrums to achieve unimaginable success, captivating millions of fans and becoming three of the most famous sporting institutions on the planet. With stunning archive footage from their greatest victories and behind the scenes access, this story is about more than three men. It is about The Three Kings - the makers of modern football.