Callum uses Harry to lure Raquel out of her hiding place to the Halloween venue where he will use her power as half-demon to unlock the gates of Hell and release the devils that will possess the party-goers. A suspicious Amy and Jake follow, like all the guests in disguise, and Amy is captured and chained alongside Raquel. However Amy knows precisely what to do to reverse the ritual and in doing so saves Raquel and the world though the girls' ordeal is not yet over as there is one final exorcism to perform.
—don @ minifie-1