Georgina Montcalm’s life is in ruins. Her father and brother dead, she has slaved to save her family estate while waiting for her longtime love Sir Trevor Longchamps to return from the Peninsular War. When he does return, though, it is to tell a haggard and exhausted Georgina that he has fallen in love with another. While riding away her megrims in a strange red fog, Georgina accidentally rescues two young sprigs of the Ton from a highwayman. One of them immediately falls in love with what he calls his Fair Amazon.
Hearing of young Longchamps’ outrageous behavior, Georgina’s godmother determines to find her a good match and brings her to London. Georgina becomes a Toast of the Ton, known to all as the Fair Amazon. Trevor realizes his heart still lies with Georgina, but by that time the Fair Amazon is besieged by everyone who matters. A continuing maelstrom of misunderstandings and cross-purposes almost results in scandal and broken hearts, but justice is served and true love eventually triumphs.