In the thousand year reign of Princess Celestia, never has she felt so lonely with the absence of Luna. Although she kept a façade of certainty to her subjects, behind the mask is a pony who is in need of some support.

Despite this knowledge, she has learned many new lessons from but there was one lesson written in her last letter. Lost and forgotten in time, it has been found once again by the same pony who written it. See and learn the final lesson that Celestia learned herself.