When a malevolent entity intent on eradicating music from the world surfaces, Nobita and his friends must unite with supernatural companions to safeguard the planet.

Editor Ejiri and occult writer Onigashira work on the horror DVD series Truly Terrifying Submitted Videos. They receive various cursed footage, including DVDs found in a bankrupt film company’s warehouse, livestreams of self-proclaimed vigilantes exploring abandoned buildings, and a strange variety show featuring comedians and gravure idols. Using his expertise and sharp intuition, Ejiri unravels the hidden secrets behind these videos.