Two superpowers, the USSR and the USA, are fighting for primacy in the space race. While the USSR is ahead, man's spacewalk is next. Two weeks before launch, the test ship explodes. There is no time to identify the reasons. And even though the risks are enormous, the astronauts must fly. Experienced military pilot Pavel Belyaev and his partner Alexey Leonov, untested and ardent, dreaming of a feat, are two people ready to step into the abyss. But no one could even imagine what they would encounter during the flight. Everything went wrong on this mission... A true story of boundless courage!