At the medical facility where doctor Agniya Smolskaya works, unusual events are taking place. In the last two weeks, more than twenty patients have died from what appears to be a harmless acute respiratory infection. There are suspicions that a new strain of flu has appeared—one that cannot be treated with traditional medicines or antibiotics.
The infection gradually spreads to other hospitals around the city, but Agniya realizes that the source of the problem is exactly her own hospital. An epidemic must not be allowed to spread! The Department of Medical Investigations receives an assignment to determine the causes of the virus and identify who could profit from the deaths of innocent patients. It turns out that there are two disease-causing viruses, and one of them was created artificially.
Now Agniya is extremely interested in developing a vaccine, because she herself turns out to be a patient with life-threatening symptoms…