A supernatural thriller set in South Carolina, South Of Hell focuses on Maria Abascal (Suvari), a stunning demon-hunter-for-hire whose power stems from within. Like those she hunts, Maria is divided within herself, struggling with her own demon, Abigail, who resides inside of her, feeding on the evil Maria exorcises from others. Maria and Abigail share a soul and a destiny, but as Maria desperately tries to overtake Abigail, she will discover how far Abigail will go to remain a part of her.

Maria becomes the target of an obsessive stalker after Abigail leads him on. David falls in with a dangerous group from Bledsoe’s past.

Tensions rise as the Society of Sons targets David and Grace; Maria faces a mad demon that Abigail is helpless against; Bledsoe's past comes back to haunt him; and Grace discovers a mysterious power.

A demonic lover makes Abigail an indecent proposal as Maria and Dusty grow closer; and the Reverend forbids his daughter from seeing David. Meanwhile, Grace searches for the truth about her mother.

In order to rescue Grace, Maria must trespass into Purgatory and face a ghost from her own past; and Enos' dark forces draw closer. Meanwhile, David confronts a terrible secret.

In the Season 1 finale, Enos pits Maria and David against each other as the ultimate showdown pulls them back to where the nightmare began; Abigail makes a dangerous deal; and the Reverend fights for Grace's life.

Enos Demon army is revealed to be a brainwashed cult, so David, Maria, Grace and Bledsoe pose as recruits and attend the seminar to learn more. Once they arrive on Sangalo Island, they fear that Enos' trap could be impossible to escape.