Tokyo. In the world's largest bookstore district, the days pass peacefully. In the alleys away from traffic, people stroll through hundreds of books, comics, movie scripts, brochures and even old maps: there is a variety to the delight of all types of readers. The Morisaki bookstore, a small family business, barely seats five people. Piles of books fill the shelves until they invade every corner of the floor and, when the bell above the door announces the arrival of a customer, its owner, Uncle Satoru, immediately peeks out from behind the counter. Recently, his wife Momoko has been helping him, but his niece Takako also often accompanies him in her spare time. For Satoru and Momoko's wedding anniversary, the young woman gives them a romantic trip. Satoru is worried about the bookstore, but agrees to let Takako replace him for a few days and move into the upstairs room, as he has done in the past. For the first time in a long time, she feels excited. Because a bookstore, she discovers, is populated with stories, not only those that hide the books, but also those of those who frequent it. And those stories create bonds. But then why is Satoru behaving so strangely? And what does the woman with the red umbrella at the end of the street want? How many more stories, emotions and treasures does the Morisaki bookstore guard within its walls?