In the sequel to The Princess Switch, Duchess Margaret and Kevin are struggling in their relationship due to the stress of her new duties as queen. Meanwhile, Stacy is busy running her own successful bakery and raising her young daughter.
When Margaret is invited to a royal Christmas coronation in Belgravia, she sees it as the perfect opportunity to take a break from her duties and reconnect with Kevin. However, things take a turn when Margaret's cousin, the mischievous party girl Fiona, arrives with a plan to steal Margaret's throne for herself.
As Margaret tries to navigate her new responsibilities and maintain her relationship with Kevin, Stacy steps in to help by once again switching places with her lookalike. Together, they must navigate the tricky royal politics of Belgravia while trying to keep Kevin from falling for Fiona's flirtatious charm.
As the coronation approaches, tensions rise and secrets are revealed, leaving Margaret, Kevin, and Stacy in a race against time to set things right and save the day.