Twilight Sparkle tries to reform King Sombra into a nice pony, when she finds his horn and takes it to Ponyville. But it is harder than expected. Twilight learns more about Sombra by talking to him and asking questions about his past. Will Twilight be able to reform Sombra, or will she have to banish him? And what happens when a villain falls in love with a princess?

King Sombra hates winter. And he has a very good reason for it. Every winter, King Sombra sneezes. And every time he sneezes, a building gets destroyed. Can anypony cure King Sombra of his sneezes before Equestria turns into dust?