Thirteen-year-old Martin is a great soccer talent and is on the verge of joining the youth national team. However, without good school performance, he can forget about his soccer career! To avoid failing, he sneaks a peek at his teacher's bag during an unobserved moment to check the tasks for the upcoming math test. He gets caught—by none other than Mandy, who everyone is already afraid of. Mandy ruthlessly exploits Martin's predicament and blackmails him. Initially, it's just for 20 euros, but then her demands become increasingly audacious. Martin is at a loss. Should he confide in his parents, his teacher, or his coach? But then he would miss out on participating in the U15 international match. Just when Martin is about to despair, a shocking message makes it clear how he should decide.