My unicorn parents called me a worthless mud pony. They pushed me every day to overcome my lowly status. When I woke up one morning with my cutie mark, I thought they would love me. I couldn't have been farther from the truth.
Derpy's father says there's a monster in the basement. He says she must never go down there or it will gobble her up. She decides to investigate anyway.
Strange, floating lights have begun to appear at night in the orchards of Sweet Apple Acres, and so the Cutie Mark Crusaders take it upon themselves to investigate. They probably shouldn't have.