Joe is an elderly dementia patient that becomes possessed by a powerful demon. In order to save him, an unconventional and mysterious exorcist, JC Garcia, must venture into his mind. Once inside, he finds far more than he bargained for: an ever-changing hellscape created by a fusion of Morris's and the demon's memories that brings JC face-to-face with his own traumatic past. All the Devils are Here reinvents the exorcism story with a unique, emotional tale about the power of love, loss, and memory.