Heather Grey an average teenager was just living in the world she thought she knew, but when she saw how a team of teenagers killed a young boy at the Pandemonium, she soon realized that her mother had kept several secrets from her. Jace and Clary are trying to help Heather to remember what her mother was hiding from her, but since Clary had already gone through the same exact treatment. Clary was determined to unleash all the memories in Heather's mind that had been blocked by a spell.