150 days after the Great East Japan Earthquake, in the fictional town of Izu. Akemi, a girl from the Tohoku region, constantly carries with her a sunflower, firmly believing in its ability to absorb radioactivity. She has evacuated here to live and work at a long-established onsen ryokan (hot spring inn), managed by her grandmother. Although faced with the harsh reality of declining tourism in Japan, Akemi and others keep their spirits up and diligently work at the hot spring resort. But the peaceful life is disrupted when a mysterious old man, arrives as a guest. Talks of constructing a geothermal power plant have come up in the impoverished hot spring resort. Ties bound by nuclear power bring a curious turn of fate for a family.