When Tris Graymark (daughter of Amatis Graymark and Valentine Morgenstern) arrives for her 'Travel Year' at the New York Institute, she is dragged on a mission with Alec, Isabelle and Jace. That's when they meet Clary. But does she already know that Clary is her sister? Read on to find out... Based partly on the TV series and partly on the book series.