Following the funeral of Simon Cordier (Vincent Price), a French magistrate and amateur sculptor, his secret diary is read out by Simon’s pastor friend to a group of people gathered around the table, Simon’s servants, and a police captain.
The diary reveals that Simon has come into contact with a malevolent entity known as a horla, capable of limited psychokinesis and complete mind control. Cordier’s interaction with the horla begins when he meets a prisoner whom the entity had driven to murder four people. The horla attempts to kill Cordier, leading to a fatal confrontation that sets the stage for the entity’s haunting.
As the horla begins to destroy Cordier’s life, he spirals into madness and seeks help from an alienist. Encouraged to pursue a hobby, Cordier rekindles his interest in sculpture and meets a model named Odette Malotte. Despite her marriage, Odette claims to love Cordier, sparking a tumultuous affair orchestrated by the horla that ultimately leads to tragedy.
In a moment of insanity, Cordier commits a heinous act, drawing the horla’s influence to a climax. Convinced of the entity’s existence, Cordier takes drastic action to rid himself of the malevolent force, leading to a fiery showdown that results in sacrifice and redemption.
The film concludes with differing beliefs among those who read Simon’s diary, with some dismissing the horla as a figment of madness while others acknowledge its presence. The priest’s perspective underscores the eternal struggle between good and evil, implying the enduring existence of the horla wherever darkness lingers.
Experience the chilling tale of Diary of a Madman Online Full Movie and witness the gripping battle between sanity and malevolence. Watch now for a haunting journey into the depths of madness and the darkness that lurks within.