In a world where boys pilot giant mechanical robots to fend off alien attacks, assisted by girls who often die during the battles, one girl refuses to play her part. Paired with the pilot responsible for her sister’s death, she gets her revenge and kills him through their psychic link instead of dying herself. Paired with a stronger pilot, she is determined to survive, to understand how the piloting system works, and to play it to her advantage. Because her revenge doesn’t end with the death of her sister’s killer.