In the twenty-sixth year of the Republic of China, the old bluestone alleys in Jiangnan Water Town were soaked by the drizzle and shone brightly. Su Qingyan followed her grandmother's last words and returned to take over the old house covered with cobwebs. Irregular carvings appear under the moss in the corner of the wall. When the neighbors meet, their eyes are always evasive, as if the old alley hides secrets that they don't want to be touched. While cleaning up the attic, she found a thread-bound diary with missing pages. There was half a yellowed ship ticket sandwiched between the pages, and a strange spiral symbol was drawn on the back. From then on, every midnight, the clock in the old house would turn upside down inexplicably, the faint sound of clogs could be heard from the alley, and the writing on the diary would smudge and deform due to the ambient humidity. She followed the clues in the diary, from the vague narration of the old teahouse owner to the hidden traces of the abandoned warehouse on the dock. Those seemingly isolated strange things gradually became a dense web. In the smoke and smoke of the old alley, realistic daily life is intertwined with strange visions. Agreements buried by time and obsessions that span life and death are slowly emerging with the mist, waiting to be unveiled.
