In the midst of the 1960s Cold War and space race, Russia prepares to send a human into orbit. Military pilots Pavel Belyayev and Alexey Leonov embark on a perilous journey, confronting numerous challenges and hazards along the way.

Spacewalk
The Soviet Union's quest to pioneer space exploration accelerates as it aims to achieve the historic feat of sending the first cosmonauts on a spacewalk, driven by its determination to stay ahead in the Space Race.