After returning from a police mission in Afghanistan, Chief Inspector Harder is set to investigate a bog body found in a village called Friedland. The confrontation with Friedland's brutal history brings a grave guilt from Harder's own past to the surface and forces her to face the echo.

Melanie is a new pupil at the Otto Leonhard High School, and Felix takes a real shine to this newbie, much to the annoyance of Ella and Felix’s gang. They believe that Melanie is responsible for a number of small thefts that have been happening at the school since she arrived. Events take a drastic turn when the class goes on a school trip. When Felix’s friends almost mess up his date with Melanie, he shrinks them spontaneously to a tenth of their size. Just for a short time, he thinks to himself. But once Melanie has left, the magic ball to restoring his friends to their proper size has also disappeared. Is Melanie behind the thefts after all? In the process, Felix not only has to shrink himself, he also must confess his love to Melanie and admit his mistakes to his friends.

Friends Franzi, Marieave and Kim planned to spend the summer rehearsing for a Peter Pan play, but when strange things start to happen at the theatre they take on the role of investigators.

Felix's school is haunted again, only this time it's not the benevolent spirit of school founder Otto Leonhard and the nuisance he caused, but the hated and long-since dead Director Hulda Stingbeard. A coincidence causes the former shrunken and skeletonized school principle to rise again. When she manages to return to real life she almost defeats Otto Leonhard, manages to shrink Dr. Schmitt-Gössenwein and Felix' parents, and takes over the school. It takes Felix, Ella and their gang to set the levers in motion to save the school and bring Dr. Schmitt-Gössenwein and his parents back to their original size again.

Teenager Connie and her friends try to save an island full of nature and place of their encounters from being destroyed by the construction of a hotel there.

A young girl goes through the ups and downs of school-life.

Already having a hard time adjusting at his new school, things take a turn for the bizarre for eleven year old Felix when he accidentally shrinks his strict principal to only fifteen centimetres in height!

East Germany. Summer, late 70's. Three years after her boyfriend Wassilij's apparent death, Nelly Senff decides to escape from behind the Berlin wall with her son Alexej, leaving her traumatic memories and past behind. Pretending to marry a West German, she crosses the border to start a new life in the West. But soon her past starts to haunt her as the Allied Secret Service begin to question Wassilij's mysterious disappearance. Is he still alive? Was he a spy? Plagued by her past and fraught with paranoia, Nelly is forced to choose between discovering the truth about her former lover and her hopes for a better tomorrow.