Gonzalo, a 10-year-old imaginative boy from Pamplona, loves football and walks through the hilly town every morning with his best friend (his football), playing with it before school and getting his shoes dirty. Every day, he's scolded during the uniform inspection by his strict teacher Ramón and punished during recess, forced to shine his shoes while the others enjoy their break, and (the worst part) playing football without him. Everything changes when Ramón decides to take things further: not only will he punish Gonzalo during recess, but he will confiscate his football forever if he shows up with dirty shoes again. The next day, Gonzalo will do everything in his power to ensure his shoes are clean for the inspection, embarking on the most exciting and difficult journey of his life, in a titanic struggle to arrive at school with his shoes spotless.