The "Salyut 7" space station in outer space accidentally lost contact with the earth. Engineer Viktor Ayokin and retired astronaut Vladimir Fedorov were ordered to take the Soyuz T-13 to search for the traces of "Salyut 7". When they were preparing to return after experiencing a series of crises such as space docking, cold current in the space capsule, fire in the space station, and failure of the solar charging system, they were told that the space station was about to be shot down. A bigger space disaster is coming...