The documentary series profiles men and women who have made exceptional contributions to the preservation of wildlife and their habits. Each film displays the beauty of nature and the importance of successful conservation actions.

Marc van Roosmalen is a biologist with a passion for primates. His love of monkeys has taken him on the adventures of a lifetime, to the little known forests of Brazil. Here he has found such unique diversity of life that he has become a professional species hunter, discovering, naming and reclassifying species. He has already named 20 new kinds of monkeys. He is now searching for large unknown mammals in the forest.