When a villain escapes Tartarus, Princess Celestia chooses Discord to help track him down instead of Princess Twilight. Meanwhile, prompted to prove that she has an important role to play, Twilight turns her focus to opening the Tree of Harmony chest.
"Get your muzzle out of those books and make some friends!" That's what Princess Celestia tells Twilight Sparkle. She may be the smartest unicorn in Equestria, but Twilight Sparkle gets an "incomplete" in friendship. There's more to life than learning magic, after all - so she goes to Ponyville on a mission to make friends. There she meets five special ponies who take her on exciting adventures and teach her the most powerful magic of all... the magic of friendship!