The Dragonborn hires Vorstag, a mercenary, to make fighting dragons less stressful. It doesn't hurt that he's a pleasure to look at, too. But Siafnir doesn't know how to react when he begins to think of Vorstag as more than eye candy. Romance, business, and adventure don't mix... or do they?
TL;DR: Siafnir and Vorstag fumble with their feelings for one another in a Skyrim where homosexuality is practiced but not necessarily tolerated by all.