It is 1983 and Russia is ready to celebrate the returning cosmonauts of their Orbit-4 spacecraft.  But the mission landing is shrouded in secrecy when one crew member is found dead, another horribly mutilated and in a coma and its commander, Konstantin Veshnyakov (Pyotr Fyodorov, 2013's "Stalingrad"), with no memory of what happened.  Psychologist Tatiana Klimova (Oksana Akinshina, "Lilya 4-Ever") is brought to the Research Institute of Moscow by Comrade Semiradov (Fedor Bondarchuk, director of 2013's "Stalingrad") to work with Konstantin who, she discovers, has returned with an alien companion, a "Sputnik."