We are often skeptical about the existence of unseen or supernatural forces. However, when unusual and unsettling events do unfold around us, we are compelled to acknowledge the presence of a malevolent entity or force. The film Marui Video explains the same phenomenon as it revolves around a mysterious murder known as the Dongsungjang Inn case. In this event, a young man recorded the brutal execution of his girlfriend on videotape. The murder itself seemed to be an act of a mentally disturbed individual. Due to the extreme gore and violence depicted on the tape, the authorities decided to conceal it in a secret location.

However, the story takes a strange turn when reporter Hong Eun-hee stumbles upon the tape. From this point on, something sinister and captivating unfolds. As the hidden truths behind the murder and the eerie video tape begin to surface, it becomes a catalyst for uncovering...