On her birthday, Clary Fray finds out that she is not who she thinks she is, but rather comes from a long line of Shadowhunters — human-angel hybrids who hunt down demons. After her mother is kidnapped, Clary must rely on the mysterious Jace and his fellow Shadowhunters Isabelle and Alec to navigate this new dark world filled with faeries, warlocks, vampires and werewolves to find answers that could lead to her mother.