The Olsson family move into a castle that turns out to be haunted. The kids, with their dim parents oblivious to all the strange things that are happening, are caught in the middle of a big mystery in the centuries old castle.
Jack and Helena find a secret entrance to a winter-closed amusement park. Inside the park, they meet the painter Manfred who presents them for a series of figures who secretly live in the park during the winter.
Ronny just moved to a small town with his family. In the house next door, Julia lives with her musical parents. Ronny and Julia become best friends, but their parents become adversaries and refuse to let their children hang out.
10-year-old Mila lives with her mother in a small town. Mom likes the neighbor Klas but that bothers Mila because she wants to celebrate Christmas alone with her mother.
Siblings Sam and Minna and their mother Eva arrive at the Orchid coast to celebrate Christmas in the sun with Aunt Anja and Cousin Bianca. It's the first time after their father's death the siblings are back on his beloved Orchid coast, and to be there is beautiful and sad at the same time. It promises to be an exciting Christmas when a mysterious mask and old pieces of wood from a sunken ship wash ashore at the hotel where they live. Grandfather Ivo tells the three cousins the legend of Pirate Aquila, whose ship sank in the battle for "the greatest treasure of them all". Meanwhile, Sam, Minna and their mother learn that the Orchid coast will be destroyed after Christmas. Can Pirate Aquila's treasure save the coast?
8-year-old Selma Traskvist and her family are in danger of being evicted from their home, when Selma meets scientist Efraim von Trippelhatt who is working to build an airship and prove Santa's existence.
Evil forces try to stop the time the day before Christmas Eve and now three children from the internship school Future Academy must try to stop them before it's too late.
An artificial black hole crashes straight into an old mansion. The crash means that the year 2020 is connected with the year 1920. When Mira and Rakel stand in front of the hole, something strange happens.
Christmas is approaching in the small northern kingdom and the people rejoice at a generous Christmas gift promised by Queen Lovisa. But not everyone at the castle is so happy and when the Queen suddenly disappears, the spoiled Crown Prince Carl Vilhelm is forced to flee for his life.
