On her 18th birthday, Constanze encounters a highly guarded secret. She discovers in amazement that she has six brothers, who have been transformed into snow-white swans by a careless word from their father on the day of Constanze's birth. Constanze is stunned when suddenly the six swans appear. They explain to her sister that only she alone can curse the curse: for six years Constanze could not speak a single word and has to sew shirts made of stinging nettles. The shirts will be able to turn the swans back into people.

Mark Demski discovers his girlfriend is cheating on him and thinks it has happened because of his small penis. Sad, he dumps the girl and promises himself never again to fall in love, but he fails. When he encounters Lara Singer he must fight with his own fears.

Christmas time at the orphanage at Westerheide Castle. However, director Anna Stolberg does not feel like celebrating. Castle owner Witt has instructed estate agent Merkel to initiate the immediate eviction of the building, which is in need of renovation. Anna tries to find a solution with doctor Flimm. But the dismissal is legal...

Home improvement queen Mona Nagel can't believe her eyes: her boss Timmermann's newly acquired finca on Mallorca, which she was supposed to "renovate" with just a few simple steps for the media, is a construction site. There is more to do here than Mona had expected. Under the watchful eye of photographer Max, the successful guidebook author and advertising figure of appliance manufacturer Timmermann is to open up the Spanish market for the family business with her campaign, which will culminate in a major press conference. What neither Mr. Timmermann nor Mona's publisher know: The "do it yourself" woman can't even screw in a light bulb properly. Wallpapering, painting or sanding wooden floorboards are bohemian villages for Mona. Now the misery is great, and Mona tries to hide her little to non-existent manual skills - and not just from the team of craftsmen hired by her boss and led by Lars.

After an exciting summer as a vacation worker in a hotel, life tends to run more normally. Tom continues to tinker with his inventions, Anna is training to be a photographer and Liv is eager but willful to pursue a career as an actress. But one day, a strangely dressed girl named Sandra shows up at Tom's door. It quickly turns out that the girl in the pink petticoat has traveled to the present with the time machine from Hotel 13. However, her appearance changes the past and with it the present and future. Tom, Anna and Liv must travel back in time with Sandra to keep the world from falling apart. Not only is Sandra's future with the movie star David at stake, but also the friendship of Tom, Anna and Liv.

Lars is experiencing exciting adventures again. First he discovers a sunken ship with Robby, then he drives away evil bandits and finally a strange bird appears at the North Pole: It's Caruso, the singing penguin.