Monica Johnson and her father relocate to where once was her mother's childhood home. Monica recently losing her mother to a tragic accident feels lost and alone. While exploring her new surroundings, she comes across an old mailbox in the yard that she decides to play with. Once Monica finds out what this mailbox can do, she builds a beautiful relationship with her new friend Alice sending notes back and forth using the mailbox. What she doesn't realize is who Alice really is and where this new friendship will lead her to.