Rejected by her bereaved father at thirteen and then jilted at nineteen, Elizabeth Ashling is deeply distrustful of men and has no wish to return to London Society. However, circumstances mean she must endure a Season, and there she meets Sir Lucius Radstock. He is as ardent a horse-lover as she is, although that is the only subject on which they appear to see eye to eye. He is initially irked by her coldness, and, in a moment of temper, gives her the nickname, 'The Unassailable'. To Elizabeth's horror, this encourages more unwelcome men to make a play for her, although she remains ignorant of who coined it. As Elizabeth thaws towards Sir Lucius all seems to be going well, until an old rival reveals that Sir Lucius has been as duplicitous as the rest of his gender.