Pinkerton detective Maggie Cartwright is given the case of a lifetime when she's tasked with going undercover as a mail order bride.  Her "fiancé" is widower Thomas Garrett, suspected of being the Whistle-Stop Bandit.

 No sooner does Maggie arrive in Arizona Territory when she's confronted by his aunt who insists the two set an early wedding date.  With the clock ticking, Maggie sets to work.

 Maggie is nothing like the mail order bride widower Garrett Thomas expected from her letters. But he's immediately smitten with the blue-eyed beauty and feels the need to protect her, not only from his aunt's critical eye, but also from the ugliness of his past.

As the day of the wedding draws near, Maggie begins to panic. The problem is that the more she gets to know Garrett and his two adorable children, the harder it is to keep up the deception. Can a man as kind and gentle as Garrett really be the Whistle-stop Bandit?  Or has she simply been blinded by love?