After illustrator Lin Xi was diagnosed with a terminal illness, he gave up treatment and went on the road alone to complete the unfinished journey for his late father. Everywhere she went, she sent a blank postcard back to the bookstore owner Su Nian - only a postmark, but no word. Su Nian posted the postcards on the window glass one by one until one day she closed the bookstore and followed the silent postmarks.
Lin Xi has been painting all her life, but in the end she can't draw anything; Su Nian never talks about love, and in the end even she can't explain what the rows of blank postcards on the window glass are waiting for.
