When the Postal Detectives Oliver, Shane, Rita and Norman discover an undeliverable love letter, their investigation initially unravels more questions than answers. As their new Supervisor Cora Brandt implements stricter policies and procedures, the team’s challenges are multiplied. In the letter, ranch owner Sam has written his childhood sweetheart with a passionate plea. But the Postables recognize a domino effect this long lost letter will have on its recipient and the people in her life. After identifying an unexpected twist, the Postables simultaneously discover clues amongst their co-workers that shed light on the case. (thetvdb.com)