The Post Office is the suspenseful thriller of six people who all have one thing in common: the post office in the quiet town of Victory, Pennsylvania. One of the six, Kate, finds herself buying stamps at the post office so she could secretly send letters to her son who is in prison. Since she would never normally use a brick-and-mortar post office, after all, she can do everything she usually needs a post office for right from her desk at work, she looks around at all the customers wondering, why do so many people use a post office? The other five characters all have their own reasons; some good, some just the opposite.