-After Clary gets her memory back from the Angels she wakes up one night with a vision of a rune she's never seen before. Instead of a bright gold like all her runes its green. Mystified Clary brings together the gang together and after a discussion and multiple spell books later, she concludes that this vision is a sign from the Angels and this time she's gonna listen. When she draws her rune -(an arrow inside an hourglass) she and the gang are transported into a room with people she doesn't recognize, except for one girl that looks just like her. Who is she?