A group of Okinawan high school girls are drafted as nurses during the American invasion of the island. As the enemy army advances further, the situation for the girls becomes increasingly desperate as food and shelter run out and the number of injured climbs, leading to the film's tragic finale.

The events of the film are based on the real facts of the Pacific War, when in June 1944 the American troops began landing on the Saipan island. On July 7, an order comes that everyone must die in order not to be captured by the enemy.