The third part of the series of football detective stories loosely follows on from the previous stories The Mystery of Sleeping Referees (2018) and The Mystery of Seven Own Goals (2019). After the holidays, everyone returns to school and the playground. The football players have a new classmate, who has a terrible time and is said to be able to read minds. And on top of that, he signed up for the Soto Alto team! And besides him, six other great players. The footballers have an important match to win in order to stay in the league. But there can only be nine players on the roster and the tension in the cabin could be cut. Will the Footballers manage to overcome all the pitfalls and keep the team together?