Lord Beerus is bored. He's visited planet after planet and he's done literally nothing but eat bad food and destroy them afterwords. But one night, during deep sleep, he had a premonition. He was fighting one known as the Alicorn Goddess of Friendship. He told Whis about his dream, and Whis told him about Twilight's battle with Tirek, and that any of the Mane 6 could be this Alicorn Goddess. So Beerus and Whis set off to find this 'Alicorn Goddess.'