Clary Morgenstern has spent her entire life under the close watch of her father and brother in fear the Shadowhunters will discover her. Valentine's secret weapon and most dangerous experiment. Clary has only ever been allowed to leave the security of her father's home when he sends her on missions. But when she gets caught, she realizes how much she needs to keep the truth from the Shadowhunters. Because if they were to find out, they'd use her as a weapon against her father. But when she meets a certain 'Golden Boy', what will she do? Will she remain loyal to her father, or trust the people she was raised to hate?