While introducing Leda Morley, last of an ancient line of gatekeepers, to the ins and outs of her daemon-collecting work, Rachel Wilde encounters something far more dangerous than any daemon: a young boy who stands alone against an unseen yet terrifying enemy that has invaded his home--an inhuman creature who, hellbent on revenge for a minor slight, intends to harm the boy's oblivious family. Meanwhile, Leda's brother, Simon, is feeling left out of...