A mix up on her first day of work sends Shane to the Dead Letter Office, where a group of quirky characters led by Oliver try to deliver the undeliverable. Though Shane wants out of this strange detail, she can't help but get caught up in the story of one misdirected letter mailed by a dying young woman to the man she was falling in love with. As circumstances around the letter get more complicated, Shane and the group break all the rules to see the letter delivered and justice done.

With a duty to deliver every last letter before Christmas, the beloved quartet of post office detectives—Oliver, Shane, Rita and Norman—are working around the clock to redirect Santa’s mail just as Oliver runs into his former Sunday school teacher. When they receive an emotional last-minute plea not meant for Saint Nick, but instead written to God, they must delay their own travel plans to make sure one little girl doesn’t lose her Christmas joy—something Oliver and Shane are also struggling to find as they each face painful holiday memories. With a little guidance from a mysterious post office volunteer, Jordan, the Postables are more surprised than anyone to discover they've been a part of more than one miracle on this Christmas Eve.

The Postables, Oliver, Shane, Rita and Norman, explore the mystery of true love as they deliver divorce papers to one couple the same day Oliver's missing wife reappears.

The POstables are on a mission to deliver a soldier's letter from Afghanistan to a teenager who's being relentlessly bullied, while Oliver's estranged father surprises him with news that shakes him to his core.

The Postables work against the clock decoding a letter to rescue a soldier in Afghanistan and reunite her with her family, while Rita competes for the national Miss Special Delivery title in Washington, D.C.

The beloved POstables discover a 200-year-old valentine that could change history, while their investigation of a damaged letter leads them to a public figure who could be brought down by its contents. And in the aftermath of Valentine’s Day, Oliver, Shane, Norman and Rita are each dealing with heartbreaking circumstances

Lead postal detective Oliver and his associate Shane have been doing a figurative dance with each other, swaying back and forth with the possibility of a relationship. Finally, on their first date at a romantic supper club, Shane begins wondering if it's a date or not, as she sees the contrast of their relationship next to the extraordinary dance performances of a couple who express the longing of her heart. As Norman and Rita work alongside each other, their personal relationship hits a bump in the road.

Oliver's Divine Delivery Theory is put to the test when he and the POstables seem to be unable to deliver a damaged letter from a military veteran that's a matter of life and death.

After Hurricane Katrina, New Orleans handyman and blues singer-songwriter Gabe Recolte was bereft. Left homeless and heartbroken, he had been forced to evacuate and relocate before he could tell club owner Hattie how much he cares for her.

When the Postables discover an antique vase, they trace it back to three girls who attempted to sell it in to save their family farm. With the farm again facing hardship, the Postables must choose between doing what's legal and what's moral.

When Oliver O’Toole and his team of postal detectives confront a vintage disposable camera from the 1980s that was found in a mailbox, the undeveloped photographs contained therein set them off on a cross-state search for a seven-year-old boy who could be in tremendous danger.

The team work to reunite a wedding dress with its rightful recipient, but find that they may have far more to do. Meanwhile, Rita and Norman’s wedding plans present new challenges.

As Shane and Oliver prepare to wed, the team helps an unwell boy reunite with a lost friend. A new employee may deliver the answer for Rita and Norman to start a family.