Barmaleykin chases Zaznaykina through the pages of various textbooks. They test on each other the law of communicating vessels, multiplication by zero, the transition from one state of aggregation to another, Galileo's experiments on the Leaning Tower of Pisa and a race in cars of all times and peoples. In the end, Barmaleykin falls into a black hole on a photon rocket and disappears along with the real Leykin, who, having learned something very important, hurries to the school library for new information.
—Tango Papa