Astronauts close their helmets and switch to a reserve oxygen supply which lasts for a maximum of 12 hours. This time for help flies out Major-General Sviridov. Because of the air coming out of Kuznetsov's ship, it rotates strongly around its axis, which makes it almost impossible for Sviridov to dock with the ship. Taking advantage of Mukhin's idea, Kuznetsov leaves the ship in outer space and stops its rotation with a compressed gas cylinder and a spare engine of the orientation system. Before the docking of the ships remains little time, Kuznetsov prepares to connect the air hose as soon as possible, but at this time his oxygen is running out. Mukhin switches the supply of oxygen from his spacesuit to his friend's, thereby condemning himself to death ... Shooting in space was made on the Soviet space station Salyut 7 and the spacecraft Soyuz T-9 by cosmonauts Vladimir Lyakhov and Aleksandr Aleksandrov. Shooting was also conducted in the Yuri Gagarin Cosmonaut Training Center and in the RKA Mission Control Center. The film received a special prize and a diploma in 1984 at the 17th All-Union Film Festival (Kiev): in the program of feature films.