Covert agent Rich Knight uses his wealthy playboy status to get into every high society event he can for the benefit of his secret agency. He's determined to remain single, but after his mother suffers a heart attack she presses her only son to find love, get married and finally give her grandchildren. When he's convinced to attend his family's annual holiday celebration, he decides to bring a fake date to keep his mother off his back. And who better than his agency's efficient, reliable admin girl? She's completely immune to him, will get a fabulous shopping spree on his dime, and won't have to spend the holidays alone.

Holly Martin loves Christmas. After all, she was born on that day and her parents made every year a celebration and a joy. But after both her parents pass away and her boyfriend breaks up with her just before the season, she's lonely. So when her secret crush asks her to be his fake date during his family's annual holiday celebration, she agrees. She might not look like his usual kind of woman, but she's going to pull out all the stops and show him she's not a mousy, plain Jane. She'll show him she's the right woman for him long after the holidays are over.