Thrilling and terrifying, this offbeat tale of terror revolves around Dr Seth Ember (Aaron Eckhart), a man who is gifted with the rare ability to delve into the minds of possessed people in order to exhaust size their demons from the inside out, which makes him an 'incarnate'. In the waking state, he is a wheelchair user who was paralysed below the waist after a horrific accident.
His work is dangerous and depletes his resources in body and mind. If he is unable to escape from the mind of the possessed, it would lead to a terrible fate. So, when the Vatican requests him to take on the case of Cameron, a young boy who is possessed by a powerful demon, Maggie, Ember initially disbelieves them and rejects the case.
Finally, after confirming that Cameron is indeed possessed by Maggie, the same evil spirit responsible for the death of his wife and child years ago, Ember decides to fight to save Cameron. Now, with the young boy’s life in his hands and his own personal redemption at stake, Ember desperately searches for a way to destroy the demon before it kills him and unleashes its terror upon the world.