Venus's friend, Sydney, becomes popular in Nerve: an online reality video game of objective-focused "truth or dare" where people either enlist online as "players" or pay to watch as "watchers". Players accept the watchers' dares, receiving money rewards that increase with the danger of the dare when completed successfully.
Vee signs up for Nerve as a player. The game collects her personal data, including bank information, and explains three rules of the game: all dares must be recorded on the player's phone, earned money will be revoked if a player fails or "bails" a dare, and a player must not report the game to law enforcement.
(blah blah blah shit I don't care about happens)
Vee and Ian meet in an arena filled with masked watchers, both dared to shoot the other with a handgun. Ian insists that Vee shoot him non-fatally, but she refuses. Ty offers to shoot Ian himself. Vee accuses the watchers of being cowards, hiding behind masks and anonymous usernames while they expect others to show "nerve". She shields Ian's body with her own, and watchers nationwide vote whether to kill or spare her. The majority votes to shoot her, and Ty fires. Thanks to Tommy and Azhar's efforts, a message appears on the watchers' phones, replacing usernames with their real names and reading "You are an accessory to murder." The message also prompts them to sign out. Thousands of Nerve watchers sign out of the game while Ian tearfully cradles Vee. When Ian points his gun at Ty, Vee, still alive, stops him. She reveals that she and Ty, with the help of Sydney, orchestrated the "killing" with fake blood and blanks in Ty's gun.