Dashing Lord Harry Traemore is perfectly content to live out his days in the pursuit of pleasure. But when he's named by the Prince Regent as one of society's "Impossible Bachelors," Harry is drafted into a ribald romantic wager. The rules of engagement are scandalously simple: The bachelor whose mistress wins the title of "Most Delectable Companion" gets to remain unmarried. Harry is utterly unconcerned about his status...until his latest lightskirt abandons him.

Enter Lady Molly Fairbanks. Harry's childhood friend actually, "foe" is more like it is the most unlikely companion of...