After the second defeat of queen chrysalis, an old Pegasus winds up on twilight's doorstep claiming she is a friend of chrysalis as the group unravels the tale of chrysalis's past can they change a queen or will she forever be a changeling.

After leaving her birth place of Equestria as an infant Kayla has lived the life of a normal human girl, but in her sixteen birthday things start to go down hill from receiving a strange gift to evil creatures coming to her school. Kayla is then transported to Equestria. Can she learn who she really is and save her homes or will she lead to Equestria's and Earth's destruction?