I remember seeing some Pekka and Pätkä films already in 1989-90 on Finnish TV. This one is the one I remember the best from those days. It begins with a scene with Pekka and Pätkä dressed as gorillas and they frighten Justiina who hides herself in the closet. Janitor Pikkarainen gets upset with them after Pätkä has called out some sentences in the yard. The proverbs play an important role in this film. The two friends decide to earn some living as artists. They start to paint. Then some children find it out and have fun in their apartment after discovering the front door open. Justiina finishes cleaning the carpets and catches the children red-handed on messing or "messing" the painting. Pekka and Pätkä find it an improvement when the children have handled the painting, not destruction. What it comes to the rest of the movie, Mona Lisa is stolen and the two friends will be suspected for the crime. But as usually the film has a happy ending - or has it? After all the final scene shows us our heroes cleaning the carpets rapidly. And they are not exactly doing it voluntarily.