Sarah and John Blume are thrilled when their son, Miles, exhibits extraordinary intelligence and abilities at a very young age. However, their joy turns to concern as Miles begins to display increasingly disturbing behavior. Seeking answers, they consult various specialists but make little progress until they meet Dr. Arthur Jacobson, a psychiatrist who specializes in reincarnation. Dr. Jacobson suggests that Miles's talents and troubling actions might be the result of a fractured psyche due to his body hosting two souls: that of Miles and an unknown entity.

As Sarah delves deeper into this theory, she uncovers a series of chilling details that point towards a dark and violent past life intertwined with their son's modern existence. Their once-promising prodigy could potentially harbor a sinister force with malevolent intentions. Facing escalating danger within their own home, Sarah is driven to confront the terrifying reality of her son's true identity and origin. As she grapples with her disbelief and fear, Sarah must make harrowing decisions to protect her family and seek a solution that could either save or doom them all.