a man and a woman agree to shoot each other as the world ends but they kiss instead

As mass of solar storms causes tsunamis, volcanoes, and flooding, a city-dwelling family attempts to flee to the relative safety of a group of high-elevation caves several miles away.

In a seemingly ordinary rural town, something strange is happening to the residents. But Shizuru Chikura is more concerned for her missing friend. Determined to find her, Shizuru and three other girls board an abandoned train and travel to the outside world, unsure if they'll make it back alive. As they venture toward the unknown, the question looms: What awaits them at the final stop?