Soul kissed

"While the world slumbers in Shadow, a fatal plague has swept through magekind. No one is immune to its ravages, and now that her father is dead, Cari Dolan must wield the fearful magic of her House to save innocent lives. At the mage Council's bidding, dangerous outsider Mason Stray joins forces with Cari to hunt down the fiend responsible. But can he trust the daughter of wealth and privilege, especially when his own son is at risk? The princess will always welcome to her bed the warrior, even if one must pay the ultimate price" -- from publisher's web site.