A secret city since Soviet times, which lives its own life and develops, suddenly becomes the epicenter of new research. It all started with the chiming of an ancient clock and a terrible howling in my ears. Waking up after losing consciousness almost two months later, Zhenya and Sasha found themselves in an empty city. People have disappeared, their usual way of life has been disrupted, but they decide to find out what happened. Two strangers go in search of the truth and answers to their questions. They will have to face their fears, difficult choices, people who submitted to the new regime, and those who oppose this regime. The city has long changed its appearance, and the truth they learn is shocking. Will they be able to stay alive and cross the city border?