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.

Maria’s birthday. Blindfolded before a swinging piñata, she hits it and tears it open. Odd, unsmiling children swarm around the candy. Suddenly, Maria is swept into the arms of her father, who whispers in her ear: “You’ll always be my baby girl, no matter what.” It isn’t sweet.

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.

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.

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.

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 enlists Bledsoe’s help to destroy a demon and free David from jail. Grace adjusts to life after possession, and Abigail grows stronger.

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.