An American cowboy, Matthew Quigley, heads to Australia to pursue an employment opportunity for a long-distant sharpshooter. The employer, Elliot Marston, wants to use Quigley's sharpshooting skills to eliminate the native Aborigines from the land surrounding his ranch. Quigley was originally led to believe that his skills would be used to remove wild dingoes and is insulted by the idea of killing off the Aborigines.
To make matters more complicated, an American woman named Cora Cobb becomes attached to Quigley after he comes to her defense while meeting Marston's ranch hands. Cora is dealing with some psychological trauma from her past, often mistakes Quigley for her husband, and constantly refers to him as Roy.
Quigley's disagreement with Marston's employment proposition leads to Cora and him being stranded in the outback where they are eventually rescued by a tribe of Aborigines. Quigley and Cora witness an attack against the Aborigines by Marston's men, which prompts Quigley to take up arms against Marston and his ranchers. Quigley has to use his sharpshooting and gun-slinging skills as a wild west battle ensues in the land down under.