English aristocrat Abbie Penraven has forged a new life for herself in the West. She has had to fight hard to gain respect and has become known as the Pinfire Lady due to her skill with her pinfire revolver. When Abbie's ranch is raided and her friends kidnapped, she once more takes to the trail, to rescue the stolen ones and destroy the nest of bandits.

Abigail, Lady Penraven, is an Englishwoman set adrift in the wilderness of the Great American Desert. But Abbie is made of stern stuff, and she develops skills with firearms and establishes herself as a gunfighter and wagon master. During a trek westwards, seeking the supposed inheritance left by her deceased father, she encounters numerous perils that test her new skills to the full.