Everypony has a secret; a life-defining aspect that they'll carry with them to their grave. If only I could forget mine...

Princess Celestia's birthday party is going to be celebrated in Ponyville this year, and everypony is hard at work with preparations. Soon, a strange visitor arrives, claiming to know Celestia herself, and decides to stay for the party to pay a visit to her old friend while she is outside of Canterlot. But something seems off about her... Could she have an alternative motive in mind?