When Claire Barton's twin is murdered, she takes his place as a code breaker for the War Department to flush out his killer. Her ruse works perfectly - until the man who once broke her heart becomes her new spymaster. He sees right through her disguise but if he thinks he can stop her from doing what she must, he's in for a bigger surprise than when he'd realized just who wore the trousers now.The last thing Lord Andrew Sedgewick expects to find when he's asked to root out a traitor is the one woman he's never been able to forget. The worst mistake of his life was walking away from Claire that Christmas six years ago.Now that he's found her again, he doesn't intend to let her go - if they both survive this holiday season.