Captain Drawski is ordered to deliver the plane to the repair plant in Bydgoszcz, where the machine will undergo repairs. A young mechanic, Marcin Mercik, is also taken on board (against regulations). During the flight, a malfunction occurs. Drawski and Mercik have to catapult themselves, but the mechanic has never performed similar evolutions. He is paralyzed by fear, so that the plane, which is losing fuel, is in danger of crashing.