When genetic diversity became minimal and humanity was on the verge of extinction, the Heritage program was launched, designed to replenish the population. It was headed by bioengineers Alexander and Elizabeth Gordeev and geneticist Peter Sergeevich. A group of scientists spent a hundred years in cryogenic sleep in order to thaw healthy embryos in the future. However, scientists could not imagine what the first generation of new people and the last hope of mankind would turn out to be.

1989-1990. General Secretary of the CPSU Mikhail Gorbachyov begins global transformations in the USSR. He passionately wants to become a star in world politics and for this he is ready to go as far as he can to meet the West. But the perestroika planned by Gorbachyov leads to fatal, irreversible consequences. Intelligence officer Alexander Nechaev finds himself at the center of an operation organized by the intelligence services of several countries. During the months spent in Berlin at the moment of the breakdown of the entire post-war world order, Nechaev changed a lot. He no longer knows who is a friend and who is a traitor, but continues to defend the honor and interests of his Motherland...

Every summer for 11 years the Belyaevs' from Severodvinsk has been spending their vacation in Gelendzhik. The Northerners stay with their old friends in the same guesthouse. The long-term friendship of the families led to the fact that a young man, the son of the head of the "Northerners" family named Sasha, this summer, firmly decided to propose to Lyusya, the daughter of the head of the "Southerners" family ... Meanwhile, the Northerners' family is on the verge of divorce. Larisa is tired of tolerating her childish husband Seva Belyaev, who just can't grow up. The last straw was the news that Seva, before leaving on vacation, quit his job without telling anyone. The conflict within the family explodes, and Larisa announces to her husband that she intends to get a divorce ... The situation in the Southerners family is not easy either. It turns out that over this year Lyusya's father has found a new girlfriend - Madina.