In the Human world, former pony, Flurry Heart finds her self with no wings, no magic and struggling to walk. every thing about her new body disobeys her wishes and she’s become clumsy . Older girl Cozy Glow, who has always been human offers Flurry Heart her home to sleep in until she finishes her mission. Flurry has a feeling some thing is familiar about Cozy Glow but she can’t place it. (she never paid attention in History class and also she never met Cozy Glow’s pony counterpart who is still stone) However Cozy Glow the human learned about her pony counterpart years ago and has been back and forth between the two worlds a lot, gaining knowledge and power, learning from the mistakes of her other.
 
Human Cozy wants to drain magic from Equestria and give her self ALL the pure magic power. This will make her god in the human world and break the stone spell on her other self and will complete the attack her other self tried and failed to do to Equestria and no pony will be able to stop her from that other end.
 
Unware that Cozy Glow attacked nd banished the human Flurry Heart (sending her some place where its likely she died but maybe didn’t) , the pony Flurry Heart trusts her unware that Cozy wants to repeat her crimes on this other Flurry