There is a secret held in the dungeons below Canterlot, deeper than the crystal caverns into the roots of the mountain. This secret is a creature imprisoned by the Princesses. It is a source of great knowledge, but may ultimately be a great enemy.
Twilight has developed a device that can detect strange signals coming from outer space; signals from aliens! She gathers her friends so that they can all listen in. But they may not like what they hear...
Two enemies wind up in Equestria due to a major mishap. Will they come to terms with this world? Most importantly, will they be able to put their old feud aside to survive?