In 2030, an inexplicable catastrophe claimed numerous lives, bringing about the downfall of humanity. Those who remained were at the mercy of an app named "81 Deadly Inquiries," offering incentives to individuals who overcame the hurdles of its dungeons. Battling against almost certain death, only the triumphant participants had a chance at survival. Guided by her team, a bright but unlucky heroine began a treacherous journey. Would she emerge as the winner against all odds, or succumb to an inevitable fate?