Megi is bullied by classmates for wearing glasses. At a concert, a song inspires her to gain confidence in herself. The next day at school, she stands up to her bullies. Another student, Rei, loves nature but is also bullied. During a class trip, Rei goes missing after being mocked. Megi and her friend Melissa find Rei after dangerous adventures in the lagoon. The bullies realize the harm they caused. The students bond over coming together to help Rei.