Adagio, Aria and Sonata got jobs as Christmas elves at the Canterlot mall after losing their pendants and their singing voices. But that all changes when Santa Claus is coming to the mall tomorrow, which means Sonata is happy to meet him tomorrow but Aria and Adagio aren't as thrilled as their sister is. However, Sonata is soon gonna find out that St. Nick is a fake.
Note: This is inspired by the 2003 Holiday Flim Elf.