Sunny Flare gets her first report card of Principal Cadance's tenure, and it's not good. Her mother, former-Principal Abacus Cinch, has an uncomfortable explanation for that.
In an alternate timeline, somepony else got to the Mirror Portal before Sunset and stole both it and Celestia away. Acting Princess Cadance is willing to give Sunset a second chance, and hopes to have Sunset's help with a matter of national security.
After the friendship games everything returns back to normal at Crystal Prep Academy. However, five students seem influenced by the spirit of friendship they witnessed at CHS, and are unwilling to go back to the cold-hearted usual of their school.