When the UK trade minister's daughter is found dead in Sydney Harbour, detectives look into the dark secrets of those close to the victim as they try to piece together the mystery.

A public appeal by Abigail wins over the press, as Max's attempts to win over Meg fail and the case throws open more questions than answers.

Simon and Abigail make plans to return home from the UK so they can lay Sophie to rest, but a sudden change puts everything on hold. An anonymous informant provides evidence that suggests a motive for murder.

Abigail deals with extreme pressure to close the trade deal, Max tries hard to obtain his informant back on their side, and a breakthrough provides crucial information that fills a gap in the timeline of the case.

Abigail makes a shock announcement as the detectives close in on the crime scene and get closer to the truth about what happened to her daughter.

Meg and Max must decide how to best serve justice after the truth of what happened on the night Sophie died is revealed.