In A Christmas Prince: The Royal Baby, Queen Amber and King Richard are expecting their first child while also dealing with the pressure of their royal duties. However, when the valuable peace treaty between Aldovia and a neighboring country goes missing, Queen Amber takes it upon herself to find it and save her kingdom from a potential war. With the help of her friends and family, Queen Amber embarks on a journey to uncover the truth behind the missing treaty and bring peace to her kingdom. Meanwhile, she also prepares for the arrival of her royal baby, navigating through the challenges of becoming a mother and a queen at the same time. The movie is a heartwarming holiday story filled with romance, suspense, and the power of family and friendship.