Light. A good thing. The sun, the stars, the moon, shining bright and powerful, lighting the way for life to progress. Good things are often called bright, hope is viewed as the light at the end of the tunnel. Darkness. A bad thing, if not evil, then sinister. Hidden places, nightmares in the dark, monsters lurking where they are hidden. Dark hearts, dark thoughts, evil things. The absence of light. All of this is true.

However, light can burn, or blind. And darkness can save, cloaking you to hide you from enemies. Where roles are reversed, and what was good becomes bad by sheer purity, and what was bad become good due to use. Light and darkness are not good and evil. They might err toward their respective morality, but they are not good and evil.

Equestria was taken by darkness a long time ago. What little light is left is barely enough. But it is a time when not all is right. Not everything is known, or understood. When good and evil blur together, and every action cannot be known to be correct. Can the world be saved? And if so, from what?