Oscar Predest is a prominent child psychiatrist specializing in hypnosis. When his son Tobias goes missing, Oscar abandons his whole life to find him. After countless failed searches, Oscar is approached one night by a woman with an unusual request — an invitation to her son’s exorcism. Surprised to hear a “specialist” has been solicited from the Vatican, Oscar attends the ceremony only to find that the voice possessing the boy recognizes him. This voice reveals itself as the spirit who once inhabited the man who murdered Oscar's son.
Alongside Lauren, the detective who led the search for his missing son, Oscar investigates the crime on another, paranormal front. What they find, in this spiritual autopsy, is a murderer with a mysterious history, which in turn leads Oscar back to the possessed child, Ryan. Through hypnosis, Oscar manages to speak to the spirit. These therapeutic sessions are as explorative as they are dangerous. But Oscar needs to know more about the conventions of this alternative world of reincarnated spirits. It opens doors of impossibility never imagined by Oscar or the Vatican specialist, Father Bosco.
As Oscar inches closer and closer to this forbidden tree of knowledge, Father Bosco, the exorcist from the Vatican, begins to exhibit strange behavior, with visible, physical injuries. What results is an apocalyptic finale between good and evil in the reincarnated world, shedding new insight into the controversial theories of predestination and reincarnation, where Oscar, Father Bosco, Ryan, Lauren, Theresa, and even Nathan’s spirit, encounter findings of an extraordinary nature.
