In the South Atlantic, where the waters sparkle with the life they harbor, Carolina Sosa, a National Geographic explorer and documentary filmmaker, embarks on a mission to uncover the dark side of fishing in Uruguay. Together with marine biologists Andrés Milessi and Agustín Loureiro, and with the support of the National Navy, the team investigates the devastating exploitation of marine resources and attempts to change the course of fishing by pursuing illegal fishermen and taking the evidence to the highest levels.