Young Su Wan builds a shared book corner in the community stilt floor, hoping to break the barrier and alienation among neighbors. But as soon as the book corner is completed, it is questioned and opposed by neighbors such as Zhang Shen and Liu Ayi, and the rational Lu Ze also kindly reminds that this kindness is easily consumed by reality. The book corner soon appears chaotic with damaged books and piled debris, and calls for its removal follow one after another. Su Wan does not choose to give up. Under Lu Ze's guidance, she understands that kindness needs rules as a bottom line, and formulates a gentle self-discipline convention. Gradually, neighbors like Duoduo and Zhang Shen are moved and actively participate in maintaining and donating books.