In the concrete jungle, ancient legends and modern hustle and bustle interweave unknown secrets. Lin Xiran, a young architect who pursues the ultimate rationality, is investing in the most ambitious project in his career - the "Light of the Sky", an ultra-modern giant tower that reaches into the sky. However, as the building rose from the ground, a series of bizarre architectural structural dislocations, ghostly sounds and unexplained phenomena began to occur frequently, challenging all the scientific laws he believed in.
When the boundaries of reality gradually blurred, Lin Xiran met Chu Yao, an antique shop owner hiding deep in the city. Chu Yao seems careless, but in fact she is well versed in forgotten urban anecdotes and folklore. She reveals to Lin Xiran an astonishing truth: those urban legends that have been passed down by word of mouth and are gradually disappearing are not illusory, but have the power to materialize. The construction of "Light in the Sky" inadvertently touched the "Echo of the City" sleeping deep underground, awakening an ancient contract that had been deliberately forgotten.
A battle between faith and forgetfulness, existence and nothingness begins. Lin Xiran must give up her inherent knowledge and go deep into the gray area of urban legends with Chu Yao to uncover the truth hidden under the neon lights. Can they find the key to balancing faith and reality before the legend gets completely out of control and engulfs the city? The "urban echo wall" is not only a symbol of high-rise buildings, but also a carrier of memory and hope, and they are the latest chapters engraved on the echo wall.
