When a mysterious star streaks across the night sky, twelve-year-old Lina Aster’s life changes forever. Struck by its light, she awakens with extraordinary powers—strength beyond measure, the ability to fly, and an unbreakable bond with the energy of the stars themselves. But with great power comes heavy secrets. Lina must balance the normal life of a young girl—school, friends, and living with her caring parents—while hiding her true identity as Herogirl, a protector destined to guard the world from cosmic darkness. Her greatest challenge arrives in the form of Umbra, the dark villain who serves as the sworn enemy of the stars. Umbra seeks to snuff out the celestial light forever, plunging the Earth into eternal shadow. Only Lina stands in his way. Torn between being a daughter, a student, and a secret savior, Lina must discover who she truly is, master her star-born powers, and learn the meaning of courage before the darkness consumes everything she loves. Herogirl is a heart-pounding adventure of bravery, family, and the eternal battle between light and shadow—a coming-of-age superhero story with a cosmic twist.