"Last Knights of Nature" follows a passionate group of conservationists and scientists, spotlighting their efforts to discover and preserve marine biodiversity. This documentary navigates through multiple scenic locales, from the volcanic islands of Capo Verde to the bustling labs in Tenerife and northern France, encapsulating a broad spectrum of marine research and community involvement.

The film features Jesus, a veteran marine biologist with a lifetime of species discovery, alongside his friends Leo and Carmen, a couple deeply involved in marine conservation. Their journey begins in Capo Verde, where they collect marine specimens with basic yet effective tools, showing a blend of enthusiasm and scientific rigor reminiscent of Darwin's expeditions.

The narrative unfolds with their return to Tenerife, where they join an international scientific mission. They meet scientific divers who look like astronauts and a young self-made submarine pilot.

A brief nostalgic interlude with Checho, an old professor who reminisces about past glories, captures the passing of the torch from one generation to another.

Significant portions of the film are driven by the uncertainties of discovery and the looming question of how many species remain unidentified due to the declining number of taxonomists and rapidly changing biodiversity. The documentary explores how these "knights" of nature come together to combat environmental and funding challenges to unveil the unseen life beneath the waves.

Scenes transition from the rugged landscapes of São Vicente to the technological confines of submersibles and high-tech labs, illustrating a stark contrast between the natural world and human intervention.

A crucial turn in the documentary involves Daniela, a young taxonomist in Brest, Northern France and her efforts to create community-driven research initiatives, promoting a new approach to conservation through public participation. Jesus, Leo and Carmen join her to be part of something bigger, an international community of explorers and scientists who come together to amplify their conservation efforts.

The protagonists of this film are not only human. The microscopic species found become central characters and fill the screen, giving unprecedented access to an until now invisible world.

Through the scientists' experiences, we witness an extraordinary expedition that challenges stereotypes and showcases their deep motivations. These hands-on explorers reveal their passion, and every tiny sea creature they find is a profound step forward.

The documentary underscores a powerful message—we can't protect what we don't know. These undiscovered species offer potential solutions to our terrestrial challenges and serve as crucial indicators of our planet's health, illuminating aspects of our own evolution."