Determined to keep Annabelle from wreaking more havoc, demonologists Ed and Lorraine Warren bring the possessed doll to the locked artifacts room in their home, placing her “safely” behind sacred glass and enlisting a priest’s holy blessing. But an unholy night of horror awaits as Annabelle awakens the evil spirits in the room, who all set their sights on a new target—the Warrens' ten-year-old daughter, Judy, and her friends.

Rebellious, quick-witted Erica Vandross is a 17-year-old firecracker living with her single mom, Laurie, and her mom's new boyfriend, Bob, in L.A.'s San Fernando Valley. When Bob's mentally unbalanced son, Luke, arrives from rehab to live with the family, Erica finds her domestic and personal life overwhelmed. With Luke and her sidekicks Kala and Claudine in tow, Erica acts out by exposing a high school teacher's dark secret.