In this delightful third installment of the beloved holiday series, the royal doppelgängers face their most glittering challenge yet. When a priceless relic is stolen on the eve of a festive Christmas gala, Queen Margaret of Montenaro and Princess Stacy of Belgravia realize they need a world-class thief to catch one. They turn to their equally identical but morally flexible cousin, Fiona, played once again with triple the charm by Vanessa Hudgens. With the help of a dashing and charismatic Interpol agent, portrayed by Remy Hii, Fiona is reluctantly recruited for a high-stakes undercover mission to recover the treasure. As the trio navigates a glamorous world of high-society parties and deceptive suspects, including a suave auctioneer played by Will Kemp, Fiona finds her loyalties and her heart tested. This festive family comedy blends heartwarming drama with lighthearted mischief, as the look-alike cousins must work together to save Christmas, proving that even a scoundrel might have a star worth following.