In this compelling documentary, wildlife cameraman David Reichert embarks on an extraordinary journey to the remote Crozet Islands, delving into the lives of orcas. His mission is to unravel their complex relationship with prey, particularly elephant seals and king penguins. As David seeks to understand these magnificent predators, scientists begin a groundbreaking study of whale parasites in Rurutu, aiming to prove the existence of distinct humpback whale subpopulations. This vital research, involving challenging underwater encounters and a never-before-achieved collection of parasite samples from living whales, is crucial for the global conservation of these endangered giants.