You receive the quest from a Dunmer woman to rescue her husband. He was born into slavery in Morrowind, and therefore did not receive the same type of connection to the Hist as other Argonians. They consider souls like that to be broken, though not in the same way Sabine was. It was a bit different situation, but it is the same concept. Communing with the Hist involves giving them a direct connection with one's soul, so it is very reasonable they can be asked to help repair the soul.