Sometimes an own goal means much more than it seems at first glance. The footballers can't believe their luck. They will finally be playing in a real international tournament! Against the best student teams from around the world. But suddenly they are faced with a huge mystery that they have never encountered before. Can you win a football match even if you don't score a single goal? And two games? Or even the whole tournament? Something is wrong here. The footballers must solve the second case in the series of football detective stories, the first book of which, entitled The Mystery of the Sleeping Referees, was published in autumn 2018. For readers aged nine and over.