As the exorcism reaches a critical juncture, Tomas engages the demon in a desperate battle to save Andy's soul. Meanwhile, Marcus and Rose attempt to get the foster children off the island, but the demon has other plans. As the storm of the century descends upon the island, salvation may come from an unlikely source.
As Father Bennett and Mouse head west to rendezvous with Marcus and Tomas, new details about Mouse's tragic past comes to light. With time running out to finish the exorcism, one of the foster children is faced with a difficult choice. But the demon has other plans.
As Tomas and Marcus continue to investigate the strange incidents at the foster home, the demon finally makes its presence known. Meanwhile, Andy and Rose take the children on an overnight camping trip, setting them on a collision course with the supernatural presence on the island.
Andy's foster home receives a surprising new addition as he confronts the strange incidents occurring on the island. Meanwhile, Bennett's uneasy partnership with the enigmatic Mouse takes a dark turn.