A high school senior finds himself immersed in an online game of truth or dare, where every move of his starts to become manipulated by an anonymous community of "watchers." Taehyung is a hard-working high school senior, focused, with a pending scholarship at Daegu Hyehwa School. Constantly in the shadow of his popular friend Jimin, Taehyung will be enticed by the notoriously hardcore reality online game "Nerve", and accept to become, for once in his life, a "player" instead of a mere "watcher". When he accepts to kiss Jungkook, a random guy who turns out to be another "Nerve" player, the "watchers" will not be able to get enough of the couple, demanding to team up against an all-night, white-knuckle truth or dare adventure all over town.