An officer accidentally leaks information about the first test of a new aircraft model. When spies get hold of this classified information, the development of the new airplane is under threat.
The film tells about the struggle of the Donbas miners in Ukrainian SSR with saboteurs.
From the Magic lantern almanac. A small Sparrow that cannot learn to fly, to the amazement of its parents, instead of taking off, begins to dance Irish dances.
