One day the usual order of one of the country's major airports is disrupted: pilot Zubov lands his plane during the fog accurately and beautifully, but contrary to regulations. Another daredevilry of Zubov ends with the fact that he sinks the plane in a swamp, almost killing himself and the adopted son of the airport engineer - Gvozdik. Zubov is deprived of his pilot's license for six months, but is retained in the team.