Magnus is a shadowhunter and has trained for 18 years. After his 18th birthday he is sent to the New York Institute to train there. He meets the Lightwoods and becomes fast friends with Isabelle. He hears whispers about an older Lightwood son, who is not seen much around the institute. Many say that he vanished but that you can see him if you look closely enough or you know where to look for him. Magnus is curious about what he hears about the eldest Lightwood and decides to look into the mystery surrounds him. What he learns shocks him and sets him on a path that he did not expect to travel down.
He couldn't remember his name. He had been stuck in this place for as long as he could remember. The only interaction he had with others was when they brought him food and the hours he was allowed to train. He couldn't speak to anyone, unless it related to his training. This had been his life for as long as he could remember. He knew it had been years since had last talked to anyone beyond anything related to training.
He hadn't been outside in just as long. He could no longer remember what the sun felt like on his face or the smell of rain after a storm. He didn't even really think about those things very often. He was at least allowed books, the books allowed him to escape his day to day life. His books allowed him to live and hope that maybe one day thins would get better for him.
He had tried to escape many times before. He wasn't successful, he was always caught and brought back to where he was being held. He was always punished for trying to leave and told that even if he made it out, he had nowhere to go and no one to help him. He still kept planning an escape because anything had to be better than the way he was currently living. He kept dreaming and hoping for a day that he would be let out of his prison, a day that he could finally escape and live a life outside of all that he had ever known. Unbeknownst to him that day would come sooner than he thought.