Joyce Sunn is looking for a career change. Her current occupation is dangerous, the hours are inconvenient and her boss is a jerk -- even the job title and uniform are a sources of embarrassment. She is Thrasher, superhero sidekick to The Jackdaw, shadowy scourge of the criminal element of gothic Grimmsmoore. With a heavily promoted motion picture about to be released, the nation is in the grips of Jackdaw mania, and Joyce soon finds herself in the middle of a mystery as to the secret origins of her mentor.