Usually a cage is there to be locked up in. But a football cage is different from other cages. Inside a football cage, hidden powers reveal themselves. For the brothers Boateng, such a football cage is at the beginning of everything: Jérôme, Kevin and George play harder against each other than against anyone else; they spur each other on and push each other to get better. Jérôme admires his older brothers and wants to play football just as well as they do.
