Ava Dobkins (Louisa Krause, Martha Marcy May Marlene) is recovering from demonic possession. With no memory of the past month, she is forced to attend a Spirit Possession Anonymous support group.

As Ava struggles to reconnect with her friends, get her job back, and figure out where the huge bloodstain in her apartment came from, she's plagued by nightmarish visions - the demon is trying to come back.