Nobody is really looking forward to Christmas this time, and someone is up to mischief with naughty pranks. Sascha gets to the bottom of the matter and learns that the pranks are the work of Rosalinde, the fourth of the Christmas elf sisters. Fourth elf? Rosalind has fallen out with her sisters and casts a curse that turns all Christmas creatures into children. Now Christmas is in danger!

George is in his 40s, a family man, on the fast track in his job - until one day a stranger claims ownership of 2m² of his house, enters the home, sets up his bed in the living room and stays. While the stranger is expanding his space in the house bit by bit, a gloomy feeling is taking hold of George.

Who is "Kalinka08"? In a chat message, she reports about experiences of violence in the family. A fake? Or does she urgently need help? Sofia and her friends are worried. Despite the Corona-lockdown, they arrange to meet and forge a plan to find Kalinka.