Clary's happy now that she will be attending the same High School as Her Bestfriend Simon. Jace the highschool player is rejected by her and furious his charms didnt work. He doesn't like that she smiles at his enemy Sebastian who likes her as well. Jace friends tease him on the girl who got away and make a bet on Clary he accepts. Who will end up loosing and what will be lost or gained?

Jace and Clary learn that Sebastian is back, but as a demon while her brother Jonathan is back in human form. The Sword split them. Will Clary learn to love her brother? Or will the past always be present?