Champion detective Fletcher is worried about the well-being of his assistant Theo. Togo is bored and they take shivers through the upcoming checkpoint. Thanks to the miracle exercises, the boy does master himself and performs all mathematical tasks surprisingly well! But the works of the whole class disappear somewhere. Who and why was it necessary? Why are all students now forced to attend extra classes? And most importantly, can Theo continue to help the champion detective? Fletcher was already scratching his ears and nose to open another case.