The drama is based on the novel "Tsubaki Bunguten" by Ogawa Ito which was nominated for the 2017 Honya Taisho and set in the traditional city Kamakura. Tabe plays the role of Hatoko who returns to her hometown in Kamakura for the first time in 8 years and inherits her late grandmother's stationery store Tsubaki Bunguten. However, the shop exists only in form and is actually a notary public which writes letters on behalf of others. As a newbie in this trade, Hatoko gradually becomes better at writing various types of letters with the best words to convey the clients' feelings to the recipients. Through her work, Hatoko's heart gets filled with satisfaction and joy which inspires her to make changes to her life.
In this era where social media and instantaneous communication via the Internet are in vogue, Tabe revealed that she has not written a letter for ages even though she writes postcards at times to thank people who have given presents to her. When she was in university, she wrote a letter to her teacher in junior high who had helped her a lot during the time when she was preparing for the senior high entrance exams but was too shy to send the letter. As such, the letter is still lying around in her home now.