There is a bit of truth to every legend, though the ravages of time can bury it deeply. Myths and lore become twisted, melded, and torn the longer they are around. One of Equestria’s oldest legends is that of Nightmare Moon. It is the core of Nightmare Night and the excuse for children to go out asking for candy with a single, common rhyme.

Nightmare Night, what a fright. Give me something sweet to bite.

On the day of the Friendship Games, the veil between two worlds is pierced. The magic of Equestria seeps through the barrier to permeate the world of humanity. Entities begin to come into existence. Lore and legend are gaining flesh, bone, and blood, yielding things both wondrous and horrible. Magic is powerful, but a limited resource. If the world at large discovers its existence, Equestria will become a target.

Thus, seven friends agree to keep the secret, but some things will not be hidden away.

This story is a sequel to Into The Depths

The horrors of the catacombs have turned to distant memories for Celestia, Twilight, and Luna. Discord’s change of heart and Twilight’s coronation have helped to ease and erase the mental scars from that harrowing night. The three princesses can even smile and laugh as Nightmare Night moves into full swing.

Yet, it should never be forgotten that those who have been touched by Tirek are forever within his grasp.

To save her sister and her faithful student, Celestia herself must travel into the ancient tunnels beneath the ruined castle in the Everfree Forest. She, and the guards who accompany her, must face the dark, twisting corridors. Still, what was Luna and Twilight's purpose at the old castle? Why were they unable to return of their own accord?

And what watches Celestia from beyond the light's edge?