Because of a suspected murder, Deputy Sheriff Beverly Trotwood is assigned to work undercover at a mailing service. She soon discovers two things: the job is not only very hard work, but a blood-soaked corpse has been left atop a pile of mailbags. With the help of her sidekick Ivory Jones, Bev uncovers a plot to steal both the business’ Internet service and their computers. In a darkened mailroom filled with plenty of shenanigans, the bad guys are defeated. So who did the killing and why? And what happens to Bev after she solves the case of the Deadly Letters?