Architect Jonathan Rivers (Michael Keaton) and his wife Anna (Chandra West) are happily waiting for the arrival of a new life. However, after a car accident, Anna disappeared mysteriously, and her life or death is unknown. Jonathan's life has fallen to the bottom since then. When he was most sad, a man named Raymond Priss (Ian McNeice) appeared in front of Jonathan, claiming that he could use EVP technology to let Jonathan hear his wife's voice. The so-called "EVP" is "Electronic Voice Phenomena", through which the living and the dead can establish contact. In order to hear Anna's voice again, Jonathan, who never believed in any supernatural doctrines, purchased related equipment and devoted himself to studying EVP. In the process of communicating with his wife, he did not know that danger was slowly approaching him...