David and Olivia find Mia and take her back to the cabin .
The girl , a demonic form of Mia , emits a black tar - like thorn vine from her mouth that slithers into Mia , and possesses her .
David and Olivia find Mia and take Mia back to the cabin .
The girl , a demonic form of Mia , emits a black tar - like thorn vine from her mouth that slithers into Mia , and possesses her .