The Nemesis crew discover an abandoned yacht adrift in the waters off the coast of Sydney. All that is found on board the boat is a dog and the scorched remains of a body, the presence of which brings in investigators whose involvement impedes Frank and Rachel’s own investigation of the incident. The boat crews respond when a bus plunges into the harbour. Helen is given the unenviable task of informing the driver’s wife, a woman she once had a relationship with, of her husband’s death. Patty Holloway approaches Frank hoping he can keep Jimmy from seeking revenge on the people who set him up two years prior.