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

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.