When a captured shark regurgitates a tattooed human arm at a Coogee aquarium in 1935, police are drawn into a case involving an ex-boxer, a missing police informer and Sydney's criminal underworld. Phillip Roope and Kevin Meagher revisit the surviving evidence and the full cold-case police file to trace a web of murder, smuggling, corruption and intimidation around Sydney Harbour. As witnesses close ranks and another man is killed, the chance discovery that exposed the crime becomes the centre of an enduring mystery. The book reconstructs both murders and argues for a different understanding of who was responsible and how the truth was suppressed.