Oleg was a brilliant programmer. Immersed in the virtual world, he forgot about everything. One day, having picked up a laptop forgotten in a minibus, Oleg discovered in it a curious spy program and some chemical formulas, but did not have time to study them properly, feeling unwell. It would seem like a banal flu, but Oleg was getting worse and worse, and his friend Gena brought a girl doctor he knew. Natasha, realizing that the situation was very serious, sent Oleg to the hospital, where the incredible turned out to be true - he was struck by an artificially modified Spanish flu virus. But who and for what purpose created a new disease, from which Oleg’s neighbors began to die one after another? It seems that he accidentally got in the way of some powerful organization, and it will not spare anyone who can interfere with it. Not only Oleg himself was under attack, but also Gena and Natasha, for whom the programmer felt something much more than simple gratitude...