MosGaz. Case No. 10: Metronome.

1982. After the task force breaks up, Major Viktor Kovalev wants to take over as boss. Around the same time, pop singer Andrei Grinyaikin dies during a concert. Someone tries to cover up the case, and Sonya Timofeeva begins her own investigation. Kovalev also picks up the trail of Mosconcert, which appears to have influential patrons behind it.