An unexpected delivery by late-night takeaway rider Zhou Yi draws him into the dark vortex deep in the city - an apartment building that only exists in legend. There are souls trapped by obsessions living there, strange stories happening that should not exist in reality, and a mysterious "mother" guarding this place where yin and yang meet.
As the investigation deepens, Zhou Yi gradually discovers that Apartment 404 does not exist in isolation: the man in the mirror of Huamei Hospital has a fatal plastic surgery, the soul harvest caused by the SoulNote music APP, the shocking conspiracy behind the new era technology... A dark network called "Obsession" is quietly covering the entire city, and the person who controls it all is a dead soul who has lived for three hundred years - Shen Ye.
While fighting side by side with Lao Gu, Su Heting and other partners, Zhou Yi finally touched the core of the truth: Lin Su's sacrifice, Shen Ye's betrayal, and the choice of the city's fate. When dawn comes, where will the new darkness come from?
This is a long masterpiece that combines Chinese urban ghost stories and suspense reasoning. Ten independent and interlocking stories connect the obsession of a city. Behind every strange story is an unfinished regret; every terrifying encounter is an inquiry into the depths of human nature.
In this world, please remember the code of apartment 404 - don't answer the late night knock unless you are ready to pay the price
