Former criminal investigation officers are ready to work together again to combat crime in a city under quarantine... At the height of the epidemic, former criminal investigation officer Viktor Pugachev (Anton Momot) returns to his native Severoneftyansk, where at that time the infection was only known from the news. No one is happy to see him here, since it was after his arrival that residents began to catch the coronavirus one after another. The infection spreads so quickly that even the head of the criminal investigation department, David Egizaryan (Igor Mosyuk), is ready to panic: the city is about to be closed for quarantine, which means the crime rate will sharply increase, and there is simply no one to fight it.