What happens to molecules at the time of chemical reactions and why do some substances become soft, while others harden, some acquire elasticity, while others become brittle? How does a viscous liquid mass turn into a light, pleasant tissue, and why can't a person live without polymers? Who were the people who made the greatest discoveries in chemistry, and what role did the element of chance play in these discoveries? What does the laboratory look like and is the life of an ordinary laboratory assistant really boring? Answering these and other questions, Mikhail Levitsky shows that chemistry is very exciting!