Agatha Oddlow has been a detective for as long as she can remember -- she's just been waiting for her first big case. And nothing gets bigger than saving the City of London from some strange goings-on. With a home in the middle of Hyde Park, a room full of beloved sleuthing novels, and a secret key that gives her access to a whole hidden side of London, Agatha is perfectly poised to solve the mystery of what's going on. But just who can she trust...