When master of disguise Sarah Louise "Sadie" Callum takes on an assignment with international connections, she has no idea her new cover will lead her on the adventure of a lifetime. Undercover agent William Jefferson Tucker is not looking for marriage --- pretend or otherwise --- but his past is a secret, his twin brother has stolen his present, and his future is in the hands of the lovely Sadie Callum.

Memphis 1890---Bookish heiress Millie Jean Cope is as clever as she is beautiful. Unfortunately, though adept at solving puzzles and cryptograms, she doesn't realize her new fiancé isn't who he claims to be, but instead is a charming scoundrel. The infamous Will Tucker is presenting himself as a British gentleman, Sir William Trueck, though in reality he is a crafty criminal looking for a hidden map to a secret treasure.

Flora Brimm, whose previous four fiancés died in untimely accidents, is desperate to marry, because producing an heir is the only way she can keep her family's estate. Pinkerton detective Lucas McMinn is hot on the trail of Will Tucker, the thief who broke his sister's heart. When he discovers the slippery fellow with Flora, he thinks they are in on the devious plot together. Will Flora be able to convince Lucas of her innocence?

Despite her father’s attempts to marry her off, Anna Finch dreams of becoming a reporter. A chance encounter with legendary gunslinger Doc Holliday gives her the opportunity of a lifetime, but Pinkerton agent Jeb Sanders is about to ruin everything.