With the Tree of Harmony gone, the Map in Twilight's castle has gone dark and, despite her best attempts, Twilight is unable to reactivate the Map now that its source of power is gone.

Until one day, when her and her friend's cutie marks suddenly begin to glow with a slowly fading light, like a dwindling soul crying out for help...

Proofreading done by RQK and the cover art was provided by Ultra-the-HedgeToaster