In 1939, English aristocrat Sarah Ashley travels the world to confront her husband and sell a million-acre cattle ranch in the Australian Outback.

Leading 1000 head of cattle across outback terrain, Sarah and Drover are faced with how far Fletcher will go for revenge.

Sarah and Drover must outsmart Carney and his men at Darwin wharf for a cattle deal with the army; Sarah discovers she is no match for the draconian race laws and is about to capitulate to Carney.

Caught between the comfort of family and the pull of his heritage, Nullah must make a hard choice.

With World War II imminent, Sarah makes a sacrifice for Nullah; Drover realises what matters most, but bombs start falling on Darwin.