While walking home from school, "Shu", a boy who loves Kendo, intercedes to protect a girl, (Lala-Ru), who is attacked by abductors piloting dragon-like mechas and is accidentally transported to the attackers' world as a result — a wasteland devoid of water and dominated by a red giant star. Lala-Ru possesses a pendant containing a vast reservoir of water, and she has the ability to control it.
Shu is trapped in this new, harsh reality, and he is beaten and interrogated repeatedly inside the warship commanded by the ruthless, manic dictator, Hamdo. While locked in a cell he meets an abducted girl who introduces herself as Sara Ringwalt of America. Sara's reason for her capture was being mistaken for Lala-Ru by Hamdo's minions. Sara is forced into the quarters of exceptional soldiers to be impregnated and is traumatized by her repeated rape. After an assault by an unknown enemy landship, Shu is forced to join an army of child soldiers; children trained for the looting of villages, in which they kidnap female villagers for breeding, and conscript orphaned male children into the ever dwindling ranks of Hamdo's army.