The Dark Ones
When Clary discovers Jace kissing another girl, she rushes out of the Institute, horrified at what she saw. With him chasing after her, she is faced with the difficult task of finding somewhere to go. After hearing a voice from the shadows, telling her to go with a group of Shadow Hunters, she agrees. It isn't until she reaches their Institute that she realizes who they are. They are none other than the most feared group of Shadow Hunters since The Circle. They're called The Dark Ones.