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...
While digging one of the many tunnels for the Moscow metro, Soviet workers unearth ruins of a dungeon. The site is closed, the metro tunnel is diverted, and amidst the bustle no one notices the tunnel workers’ foreman pocketing a little ‘souvenir’ – a book-sized frame made of precious metals featuring an inscription in an unknown language. Decades later, the foreman’s grandson Ilya, who works as a courier, discovers the ancient relic in a pile of old junk. Oblivious to the true value of the family heirloom, he soon learns about it from a mysterious stranger. The relic is the key to the secret location of the priceless ancient library that belonged to Ivan the Terrible. What Ilya doesn’t know is that the search for the lost library has been going on for centuries, and now very powerful people are after him. Ilya and the mysterious stranger decide to try their luck in finding the library.
Peace and tranquility have set in Belogorie. The evil was defeated and Ivan is now enjoying his well-deserved fame. He is surrounded by his family, friends and small wonders from the modern world that help him lead a comfortable life. Luckily, he has his Magic Sword to cut a gap between the worlds to get some supplies quite regularly. But when an ancient evil rises and the existence of the magic world is put to danger, Ivan has to team up with his old friends and his new rivals. They will set out on a long journey beyond the known world to find a way to defeat the enemies and to return peace to Belogorie.
In 1984, a Russian research team goes below the surface to find out what secret the world's deepest borehole is hiding. On their expedition, something unexpectedly gruesome awaits the researchers.