Due to her controversial methods, young doctor Tatiana Yurievna (Oksana Akinshina) is on the precipice of losing her medical license. Her career may not be over, though. After she's recruited by the military, Tatiana is brought to a secure science research facility to assess a very special case, that of Konstantin Sergeyevich (Pyotr Fyodorov), a cosmonaut who survived a mysterious space accident and has returned to Earth with a unique condition: there's something living inside of him that only shows itself late at night. The military has nefarious plans for it. Tatiana wants to stop it from killing Konstantin. And the creature itself thrives on destruction.