Plasticized follows an ocean journey with the 5 Gyres Institute, a non-profit organisation that focuses on reducing plastics pollution through research. The expedition was the first scientific journey looking at plastic waste across the South Atlantic Ocean. The film takes a look at one of the institute's global missions: studying the effects, reality and scale of plastic pollution around the world. The boat skims the surface of the ocean by trawling, in order to examine the toxic effects of plastic pieces to tissues of marine life. Many tiny bits of plastic are found contaminating the waters, and they're sometimes not seen because the rough waters push them down. Every few kilometres, one teaspoon of plastic is collected. This may not seem like much, but this amount adds up substantially, considering that the ocean is vast and covers two-thirds of the planet.