As coronavirus infections continue to spread in Europe, Nui, a French actress loses her male co-star to COVID-19. Just a few days earlier, she was kissing him on stage. Why did Nui survive? Unable to find an answer to these recurring questions, Nui one day loses her voice and decides to return to Japan for the first time in five years and goes to the Kinosaki Onsen for treatment. Her friends died by chance, and she survived by chance. Unable to affirm her own life, she meets Takogawa, the Insect Energy Research Institute’s director.