Matt Busby, Bill Shankly and Jock Stein all came from mining communities around Glasgow where the call of the pits was only drowned out by a call of the pitch, and only then if your talents warranted it. 'The Three Kings' offers a fascinating look at three remarkable men and managers. How their upbringings shaped their lives and their football teams. How they became the best of friends and how they became the fiercest of rivals. Each man arriving in three great British industrial cities and changing the life of the people forever. Glasgow, Liverpool and Manchester. They would turn three clubs in those cities into three of the most famous sporting institutions on the planet. Celtic, Liverpool and Manchester United today have a combined global fan base of billions, and this is the story of how that happened. This film is about more than three men. It is about Three Kings the men that made modern football.