The series focuses on flight crew consisting of commander, twice Hero of the Soviet Union, pilot-cosmonaut of the USSR V. F. Bykovsky and of the researcher-cosmonaut Hero of the Soviet Union, hero of the GDR, pilot cosmonaut of the GDR 3. Ian on the spacecraft "Soyuz-31" and "Union-29" (26.08.1978 - 03.09 1978).
To prepare for the flight. Booster and spacecraft Soyuz in the Assembly shop on the slipway.