Haven Lockwood's Christmas takes a nosedive when she discovers that her mother and identical twin sister, Brynn, ditched her, leaving her to spend Christmas alone in their New York City apartment. To make matters worse, Brynn's boyfriend Wyatt shows up, ready to take Brynn on a road trip to Atlanta to meet his family. Haven is fully prepared to tell Wyatt the hard news-that her flighty twin sister jetted off to Ireland with a movie star, leaving him...