A fantasy novel takes the reader back in time. Young Vanka Melnikov masters the ability to travel through time, using all kinds of dams. Finding themselves in the future with their friends, Andrei and Tanya, they see and feel that the future is not to their liking. They learn that the USSR no longer exists, which depresses their friends even more. On one of the trips, the “space-time continuum” is disrupted and the future becomes apocalyptic. Another series of hits, and Ivan becomes obsessed with rectifying the situation.