Song, a Duros mercenary from the Duros species, was a member of the mercenary unit commanded by Ronen Tagge, a member of the House of Tagge. Tagge dispatched the Duros, along with a number of other hired guns, to track down Doctor Eustacia Okka, with the intention of using her knowledge to locate the mythical Rings of Vaale. Okka managed to flee, joining forces with the team of the renegade archaeologist Doctor Chelli Aphra, who had their own agenda to uncover the Rings. The mercenaries pursued Aphra's crew to the city of Vaale situated on the planet Dianth, where the Rings were said to be located.