There's witches, a family of them. They live in Savannah, GA. Mercy is the youngest, and also the only one born without any magic. There's boys, family drama, voodoo/hoodoo, and death. Above all, the Line that keeps the super nasties away from our dimension must not be compromised. 
 The Line started off very strong for me. I liked Mercy the tour guide, with her freshness, humor, and irreverent attitude. Her being the black sheep of the family without any magic is an appealing storyline. Some of the other characters also appealed to me, mostly Uncle Oliver and Mother Jilo. 
 Then things got a little gag-worthy the way Mercy continued to swoon over her sister's boyfriend, while at the same time trying to convince herself to like a long-time childhood friend. Oh, the drama. 
 Later, weird plot twist after weird plot twist kept popping up, finally culminating in an ending that had way too much going on, and whacked stuff at that. I ended up with the 'wait, what?' expression on my face. A few times I rolled my eyes and exclaimed 'really??' aloud. 
 Still, I was entertained, and I never wanted to stop reading it, so it gets a few stars. I won't be reading any sequel, however.