25 parts Ongoing Letter Keeper follows Delia, a 22-year-old before-and-after school elementary teacher who, bored with the monotony of her life, decides to join a penpal program. When scrolling through letters, she stumbles upon Aubrey-an inmate who has been behind bars since he was 15, convicted of murdering his father after his father brutally killed his mother right in front of him. Now 25, Aubrey is months away from being released, and Delia's curiosity leads her to write him. As their letters grow deeper, Delia finds herself drawn into his complex world, uncovering the pain and trauma that have shaped him. But as Aubrey's release nears, Delia is left wondering if their bond can survive the transition from words on paper to reality-or if some walls can never come down.