The CH Postal Company has just received a request to transcribe a love letter from Irma Felice, a famous opera singer. Accepting the task, Violet Evergarden visits Irma to write her letter. However, not only does Irma provide little information, she asks Violet to write based on her own feelings. Despite Violet's numerous attempts, Irma finds every version of the letter inadequate.
Violet consults her colleagues, and they help her out by writing love letters of their own. Yet even those are rejected by the opera singer. As a last resort, Violet asks Irma for her true thoughts and feelings, hoping to find the missing puzzle piece. Will the Auto Memory Doll be able to translate Irma's emotions into words?
(Source: MAL Rewrite)
Note: Unaired episode included with the 4th BD/DVD release. It takes place between episodes 4 and 5 of the show.
— Description from AniList community (anilist.co).
