Raw materials around the world are becoming increasingly difficult to find; some are already running out, prompting large mining companies to turn to the depths of the sea. It is said that only about ten percent of the seabed has been explored – the potential of its discovery seems endless, and the desire for raw materials unstoppable. Four kilometres below sea level, a mining robot of the Belgian company Deme-Gsr scrapes the seabed in search of rare metals. On another ship, an international team of marine biologists closely monitors the operation. On board the third ship, the Rainbow Warrior, Greenpeace activists protest wildly. What are the implications of this possible future industry?