Short spoiler: She's a black magician who brings her three siblings back from the dead after an attack during a carriage accident. Black magicians are punishable by death, as are their immediate and extended family members. The story revolves around hiding her siblings, or rather the "zombies," and her abilities from the crown prince (who fights against black magicians). And, of course, there's the battle against other black magicians, the Holy Land, and so on.
I'm on chapter 40 and I highly recommend the story because, apart from the romance, it doesn't have any clichés like reincarnation :)