It's been a thousand years since anypony has seen the sun.

A thousand years since Celestia's name has been spoken, and all memory of her warmth and light has faded away into the night. The sun goddess of old had been killed during a coup by her sister, Nightmare Moon.

In this world of unrelenting darkness, three ponies find a ray of light. Hope.

In the beginning of Celestia and Luna's reign over Equestria, it was decided that four alicorns should be created for the second most powerful elemental force other than Night and Day, the seasons. Four "Keepers" were created for each season, and were tasked to control the weather during their season and provide smooth transitions from one season to another. Luna created the Keepers of Winter and Autumn, Snowhoof and Amberleaf; while Celestia created the Keepers of Summer and Spring, Brightmane and Lilyheart.

Now we draw to the present. Luna has returned from banishment, Snowhoof also had been banished and he is returning
as well. In Luna's absence, international relationships had degraded and the whispers of world war pierced the uneasy tranquility. With Luna back, world leaders fear more treachery from Luna, and a harsh winter from Snowhoof as vengeance for his brutal incarceration. War breaks out as leaders fear food shortages, and adverse climate changes. Starlight Mirror, Luna's champion and general, must restore peace before the world is engulfed in war.

Contains: A few instances of foul language, combat violence, and suggestive material