Digger Galactic Treasures puts the player in the role of a worker in the distant future, where humanity has spread throughout space. This expansion was driven by the search for minerals, but habitable planets remain a rarity. The entire galaxy is controlled by the mega-corporation GRAVEX Inc., which exploits the labor of miners and treasure hunters. The story begins with the inheritance of a decommissioned, half-disassembled ship and a notebook from his grandfather, who once worked as a researcher for the corporation. The journal contains the coordinates of treasures and fragments of a mysterious artifact, the Heart of the Void.