A young St. Petersburg doctor Andrei Ilyin discovers that the image of a door with a spiral is repeated in the dreams of his patients. He himself sees her in his dreams. The forbidden door cannot be opened, where it leads is unknown... A sudden shocking catastrophe turns the life of a doctor upside down. Now Andrei can penetrate beyond dreams - into another world where he has extraordinary abilities. But for what? Is it really to save one single person in that world?..