The story takes place in the new millennium, set at a school in the city center. The fresh and simple campus meets the surrounding high-rise buildings, two completely different atmospheres. The drama not only focuses on the teenagers facing the adult world, but also their journey to support each other and grow together. On this road, how will these young people of different backgrounds and personalities face the conflict between the innocent campus and social reality? The youth run towards the sun in face of family, friendship, and ignorant love.