Caves. Deep, dark, and dangerous. A paltry, trivial dare. Fulfilled just for fun? Tribulations, and secrets, lurk in the shadows.

A disappointing gala party leaves Princess Celestia lamenting the loss of her imprisoned sister, Luna, who has been gone for 20 years. Lonely and heartbroken, Celestia finally takes action on what she should have done long ago.

Twilight Sparkle receives an unexpected visitor late one evening in Canterlot.