Anthony van Leeuwenhoek, a Dutch naturalist of the 18th century, the founder of scientific microscopy, makes a lens in his workshop. He is visited by an English scientist, a member of the Royal Society of London. Leeuwenhoek shows the scientist his "microscope". A scientist examines a flea, mold on bread, and other objects through a "microscope." He recommends that Leeuwenhoek write about his invention to the Royal Society of London. Leeuwenhoek refuses. The scientist writes the letter himself. Leeuwenhoek examines different objects through a "microscope". He is visited by a friend of Google, with whom he shares his observations. Leeuwenhoek and Google talk about the origin of the "little animals" in the water. Leeuwenhoek takes samples of rainwater and pond water. The simplest microorganisms, taken through a microscope. Leeuwenhoek writes a letter in which he outlines the results of his research.

Based on the play of the same name by M. Gorky, staged by the Central Academic Theater of the Soviet Army.