Airship racing, finding enemy spies, solving mysterious crimes - this is not how Marvel Welch imagined studying at the Faculty of Magical Mechanics. And if we add to this the interest from the formidable dean, friendship with a dangerous trotter and the death of students - there will simply not be at the academy. And the deeper the adept Welch plunges into the investigation and other people's secrets, the more she risks losing not only her place on the faculty and the sympathy of her beloved teacher, but also her own life.