The plot tells about a museum on Lesnaya Street in Moscow, where in 1905 there was an underground printing house that published the newspaper Rabochy. View of the building and museum exhibits. Rabochy newspaper; photographs of the workers of the printing house. Schoolchildren visiting the exhibits in the museum. Primitive animals and other exhibits in the halls of the new paleontological museum in Moscow. A museum employee talks about the work of paleontologists (synchronously). Exhibition of world car models in the Polytechnic Museum in Moscow, dedicated to the 100th anniversary of road transport. Visitors to the exhibition examine models of old and modern cars.