Onneli and Anneli receive a task from their neighbors Tingelstiina and Tangelstiina: The girls are sent to take care of the neighbors’ forgetful brother Vekotiitus, who Is also an Inventor. Onneli and Anneli explore his farm’s wonderful Inventions and end up in a great adventure as the farm is threatened to be demolished. Onneli and Anneli save the family farm with one of Vekotiitus’s inventions but the rescue operation requires help from their friends at Rose Lane and even a visit to the world of dreams.
The film directed by Saara Cantell is based on the book by Marjatta Kurenniemi. It is the fourth film in the Onneli and Anneli series.