After clearing the qualifying rounds for a televised quiz show, Shouta Kasama becomes one of its 10 finalists, joined by his girlfriend, Hina Soekawa. Guided by popular TV host Kouhei "Fujikou" Fujio, the contestants hail from various backgrounds and are prepared to face the challenge. However, once they enter the set for the quiz, they soon realize that the stakes are far higher than they first assumed: answering a question incorrectly results in death. The players must collaborate to determine the answer to each question, relying on their individual skills and wit to decide whom they can truly trust. As the threat of death draws ever closer, Shouta and Hina begin to question what measures they are willing to take in order to survive.