Jedi Master Sifo-Dyas died under mysterious circumstances years ago. When a secret Jedi mission accidentally finds his lightsaber, Anakin Skywalker, Obi-Wan Kenobi, and Master Yoda investigate Sifo-Dyas's death again. To keep them from uncovering the Sith conspiracy, Darth Sidious orders his servant Darth Tyranus to erase all traces.