A group of postal detectives work to solve the mysteries behind undeliverable letters and packages from the past, delivering them when they are needed most.
A legendary supervisor makes a grand entrance in time to oversee the postal detectives unravel a mystery behind a letter from a young boy whose life is in danger.
The postables hunt for clues to deliver a package that could change a family forever, while their tough-as-nails supervisor turns towards a new life chapter.
Justice comes in the form of a letter as the team at the Dead Letter Office solve clues to deliver not only a letter, but an unspeakable truth that has been buried for years.
