Stepán Pavlík (Jirí Menzel), a design engineer of connection technology, longs to become a astronaut. He sends his application to Moscow and waits for the answer. He meets the team from the observatory in Ondrejov, where he also encounters a mysterious girl Mab (Lenka Skopalová), who sometimes shows up close to the observatory. Finally, the answer comes from the Academy of Science in Moscow. On the basis of the Academy's decision Stepán is taken on at the observatory, where he replaces engineer Málek (Jirí Kodet) who has resigned.