At a restaurant visit happens to the distracted professor and flea animal expert Loris get his overcoat replaced by Lieutenant Juncker. Lt. discovers the mistake at a night grog with two joke hungry friends. In the professor's coat he finds the professor's notes for the next day, and Lieutenant Juncker bet with his cronies that he should be able to carry out the professor's daily program without being exposed.
A murder is committed in an apartment building in Stockholm. And afterward all clues point toward the Justice of the Supreme Court and his sons. But who did it? And why? And will they be able to live with the guilt?
A journalist is writing a critical article about the prison service in Sweden. The magazine's editor in chief does not agree with him and removes the article. The journalist then plans to fake a crime to gain knowledge about life in prison.
