It has already become clear that a new era has begun. And life is divided into before and after. She also divided her friends Lyuba and Lyudmila-Apelsinchik with a different attitude towards covid.Being on self-isolation, Lyudmila, restless by nature, secretly goes for a walk in the park. And almost becomes a victim of a maniac. She is rescued by a dog that the owner decided to walk in the park at this late hour. Friends decide to help her find the attacker, especially since the next victim, unlike Lyudmila, was not lucky. Her tormented corpse is found in the morning in the same park. Further more ... Everyone is at a loss, what kind of a strange maniac and what does a big black dog have to do with it?It seems that she is the key that unlocks the mystery of serial murders.