After an odd meeting with a new mare in Ponyville, Twilight Sparkle finds her life turned upside down as she discovers the power of Persona. Entrusted with great responsibility she must save other ponies in Ponyville from the depths of their own minds, Shadows, and unravel the mystery of why the supposedly ancient Personae and Shadows are just now awakening in Equestria.

Can she find the answers in time or will she be too late?