When her mother disappears sixteen year old New Yorker discovers that she comes from a long line of Shadowhunters, half human and half angel warriors who protect the world from demons. Along side her mundane best friend, Simon and fellow Shadowhunters Jace Wayland, Alec and Isabelle Lightwood, and High Warlock of Brooklyn Magnus Bane, she unravels the truth her mother has been trying to hide all her life.