The Master and Margarita.

Maestro Nikolai Masoudov, a talented writer, and his assistant Margaret, are working on a biblical story of Pontius Pilate. The Satan — Woland, and his lieutenants, are harassing Master by surveillance, by killing his friend, and sending another friend to Gulag prison in Siberia. Victimized by their harassment, Master becomes paranoid, and is locked up in a mental institution. Margaret is trying to save him regardless of the danger.