The First Four Hat

Every five thousand years, in conjunction with a planetary arrangement, a 'Great Evil' appears whose purpose is to destroy life. In preparation for the next appearance in 2263, a group of aliens called the Mondoshawan arrive on Earth in 1914 to extract the only weapon capable of defeating the Great Evil, a collection of four stones representing the Classical Elements (Water, Fire, Earth and Air) and the eponymous Fifth Element that conjugates the other four into organic life.