When travel writer Campbell Wallace is contacted by her biological father's wife about a reunion after he abandoned her as a child, she uses it as an opportunity to get to know him and write a profile about him and his community's Père Noel for the holiday season. Upon arriving in Sorrento, Louisiana, she soon finds love in an extended family and with a community leader tasked with hosting her while in town.

Upon learning that the royal family is facing a serious security threat, MI5 agent Claire must go undercover as a nanny to keep them safe. However, it doesn't take long when she's on the job that she realizes she also has to resist the attention of her charges charming uncle, Prince Colin and fourth in line to the throne.