The little girl Mimmi, who is about to turn six, lives in an apartment in Sweden with her parents. The series follows Mimmi's adventures as she is starting kindergarten and making new friends there and going on field trips, as well as her life with her parents and relatives and visiting the restaurant where her mother works. The series is based on the popular children's books by Swedish author Viveca Lärn (previously known as Viveca Sundvall).