One day Pavel, a young man wounded in the war, suddenly shows up at the home of a Moscow scientist name Krymov and claims to be his illegitimate son. Krymov denies this, but out of compassion he helps arrange a necessary operation for Pavel. Then certain things begin happening which suggest to Krymov that he may have a psychologically unstable fellow on his hands.

Most popular video bloggers were gathered to taste a new energy soft-drink in a mansion, which turns out to be a trap. To escape, they have to answer the question correctly: Who wants to kill them?