Back on deck after having shot her fiancé corrupt copper, John ""Knocker"" Harrison dead, is Detective Rachel ""Goldie"" Goldstein, reacting snappily to being dubbed ""Gunner Goldstein"" by a colleague with an unhealthy interest in what it's like to kill someone. Dave McCall is at the receiving end of a spear from a sunken and booby-trapped car, loaded with stolen gold ingots. Goldie and Frank Holloway investigate a bouillion robbery. The ""Nemesis"" crew are looking after a prisoner, a former Olympic rowing champion.

A light plane crashes in Sydney Harbour and the divers have the task of pulling out the dead bodies.A gun-shy Goldie tries to come to terms with her problem.