A mysterious videotape rumored to kill viewers seven days after watching begins claiming victims, starting with a group of teenagers who are found dead under inexplicable circumstances. Journalist Reiko Asakawa, intrigued by the sudden deaths, discovers through her investigation that her niece was one of the teenagers who died after watching the tape. Fueled by a blend of professional curiosity and personal concern, Reiko sets out to unravel the truth behind the ominous curse. She tracks down the tape and, defying warnings, watches the eerie compilation of abstract and disturbing imagery herself. Upon completion, she receives a chilling phone call that marks the start of her seven-day countdown to an unknown fate.

Teaming up with her ex-husband, Ryuji Takayama, a man with a keen intellect and an interest in the supernatural, Reiko begins a frantic race against time. They delve deeper into the tape's origin and the dark history attached to it, hoping to break the curse that binds her to its deadly prognostication. Their investigation leads them to the eerie history of a mysterious woman and an intertwining family narrative filled with tragedy, enhancing the growing sense of dread as the seven-day deadline looms closer. As the mystery behind the tape unfolds, Reiko and Ryuji are thrust into a harrowing journey that tests the limits of their resolve and their will to survive the impending doom that the tape promises.