Plett was a male Ho'Din from the planet Moltok who served as a Jedi Master during the final decades of the Galactic Republic. A talented botanist and ecologist, he settled on the remote Outer Rim world of Belsavis, in an isolated valley that came to be known as Plett's Well. There, he practiced his botanical skills for seventy years, genetically tailoring plants to the unique environment. At the time of the Great Jedi Purge, he provided refuge to dozens of students from the Jedi Temple within his compound.