Ullerup, a diligent advertising executive, found herself working with her nervous colleague Donovan O'Connell to produce the ultimate Christmas ad for a new mobile phone. To complicate matters further, Melanie Donovan is Santa Claus in the annual office gift exchange. In order to keep her identity secret, she sent Donovan an email from Santa Claus to confirm his perfect gift. However, when Donovan mistakenly assumed that another colleague was his secret Santa Claus, her plan stopped, which prompted Melanie to work to show Donovan that she was his perfect Santa Claus.