The MV Peace is a mining vessel that started life as the Dock Express 20, a semi-submersible heavy-lift ship, before De Beers converted it to hunt diamonds along the seabed off southwestern Africa's South Atlantic coast. The film follows the crew as they work the ship's mining systems, tracking how a hull designed to carry oil rigs and cargo was rebuilt to vacuum up gravel from the ocean floor in search of gemstones washed out to sea over millennia by the Orange River. Interviews and onboard footage cover the engineering behind the conversion, the logistics of running a mining operation in open water far from port, and the processing equipment that sifts diamonds out of tons of sediment. The film treats the ship itself as the main character, explaining how offshore diamond recovery works as an industrial process, from positioning and dredging to sorting the final stones, giving viewers a close look at a highly specialized vessel most will never otherwise see.