Some discoveries sound almost too fantastic to believe. For example, this one: There are plants that can suck heavy metals out of the earth. And to such an extent that they can be used to clean up contaminated areas. Ever since these superplants were discovered, scientists around the world have been racing to find the most spectacular applications. The film Superplants explores the phenomenon of phytomining and meets leading scientists in New Caledonia, Australia, France and Germany.