Princess Celestia invites Twilight to go to the Hearts and Hooves Day Ball with Prince Blueblood. Twilight not wanting to make her teacher angry she accepts even though Rarity objects to the idea. Rarity now wants to spy on Twilight at the dance, but she needs a date, so she invites Spike. Rarity also needs the help of a Pegasus, so she reunites Rainbow Dash with her love from flight school - Thunder Flicker.