This book investigates the bizarre 1935 discovery of a human arm in a Sydney aquarium shark, which triggered a complex criminal investigation and a sensationalized legal trial. The author, Vincent Gatton Kelly, utilizes historical records, police reports, and contemporary press accounts to reconstruct the events surrounding the identification of the victim and the subsequent pursuit of the perpetrators. The narrative examines the intersection of forensic limitations and public obsession during the mid-1930s in Australia.

The subject matter points to a detailed, historical account of one of Australia's most notorious criminal cases. The framing suggests a focus on the procedural aspects of the investigation and the societal impact of such a macabre discovery.