Open space. Earth's orbit. The American spaceship Gemini is in big trouble. Spinning randomly, it quickly approaches the Soviet orbital station. A collision is inevitable. Cosmonaut Sergeev, piloting the Salyut, turns on the main engines and tries to take the bunch to another orbit, but the engines are too weak - he won’t make it in time! And the Gemini crashes into a docked Progress truck. Team from Earth: reset Progress! Sergeev tries, but the truck seems to be stuck to the station. An American astronaut, fleeing a fire on his ship, goes into outer space. How long will he have enough oxygen in his spacesuit? On Earth at this time they are deciding whether to save the American. Seconds count. And Sergeev makes his own decision...