The beautiful woman and the brave man disembark the train at the tiny station in the desert. He is the test pilot of the hypersonic nuclear-powered plane called Cyclone, and she is the physicist studying the strange phenomenon encountered by the first flier of the Cyclone jet, named Kazantsev.

A police detective is trying to find a murderer who uses a new recently developed drug for his crimes.

A tale based on a classic novel by Alexander Pushkin.