Having lived two years in isolation since the death of his daughter, psychic Dr. John Clancy is asked by his friend Joe Merriweather, an FBI special agent, to help him solve several murders committed by a serial killer. FBI special agent Dr. Katherine Cowles, Merriweather's partner, is skeptical about Clancy's gift, but soon comes to discover otherwise. The victims all turn out to have been suffering from terminal illnesses and Clancy realizes the killer has abilities exceeding his own. Merriweather is shot by suspect and while in hospital admits he was diagnosed with terminal cancer. After the funeral, Clancy is confronted by the killer, who explains he is sparing his victims from a slow death, killing them out of mercy, and that he engineered Merriweather's death. He arrogantly declares he has seen all the possibilities but Clancy surprises him by doing something he hadn't predicted, nonetheless Ambrose escapes.