Events originate at the end of the 19th century in Paris. Indener Gustave Eiffel, endowed with professional talent, dreams of creating an unreal underground road as he sees it in the future. But when he meets a mysterious person from his own past, the world of Eiffel changes dramatically. The novel turned his head, and he decides that he should create a real architectural masterpiece, which will look like a huge openwork tower. And this creation becomes the personification of Paris, as well as love and romantic mood. And Gustave himself did not even think that he could achieve such an effect.