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Overview
Ten individuals are summoned to the remote Natural Island Hotel on Heitaijima by its enigmatic owner, Nanao Shin. Arriving with a blend of curiosity and trepidation, they sit down for a dinner that quickly takes a dark turn. A disembodied voice exposes their hidden sins, igniting paranoia among the group. As tensions rise, the first murder shocks them into a frantic scramble for survival, leading to a deadly chain reaction. After several days, when police investigate, they find the island locked tight with all ten guests dead. The mystery deepens: who is the killer, and what connects these victims?