Why did Napoleon dismount from his noble white horse below the Great St. Bernhard mountain in Switzerland and ride a mule over the pass? What distinguishes mules from horses? How is a mule bred and who is the father of a hinny? The documentary MULE examines the fabled animal and shows how it has changed over the last 50 years from the indispensable pack-animal to the captivating, recreational comrade. MULE is not a traditional movie about animals, but rather an entertaining snapshot of men and animals. Scientifically and historically researched findings are mixed with beautiful scenery and refreasing anecdotes. Mules and hinnies have many loyal friends. Anyone who sees the movie, will know why.