A new alicorn is born to Twilight Sparkle and Flash Sentry. When a son of King Sombra rises, Twilight sends her baby daughter away. Far from home, Sun Bright must find her way back before darkness covers all of Equestria.

Twilight and Flash Sentry have a daughter but Deep Sorrow, King Sombra's son, has his own plans for the new princess.

Based on the unfinished movie