Masako, a 50-year-old housewife, is a former hero of justice. One day, while Masako was out for a walk, the aunts in the neighborhood were attacked by mysterious monsters! Masako transforms into the hero "Obared" and fights. But the aunts are taken away! When they arrived at the monster's hideout, the aunts were seriously injured on the verge of death. Just then, Dr. Kimura, who made Masako a hero, appears and remodels the aunts into heroes! Then, Masako and her friends form the "Menopausal Sentai Obaranger" and face the final battle against the evil organization!