The Fight to End Lucifer

((Okay so this is going to be like Supernatural. I just like the plot. Though I will not use any of the characters or scenes (I'll try not to)) Three girls, one guy, all family. Their parents were killed when they were born. They've lived on the streets their whole life, all while knowing what killed their parents. Lucifer. He wanted Kc's soul for what he thinks it can do, but their parents fought him off and they died. Now the kids are avenging them, killing every supernatural being alive, slowly advancing towards Lucifer.