Overweight high school girl Ella gets brutally humiliated and publicly rejected by her crush Noah and his mean girlfriend Olivia. Devastated, she abandons junk food and starts strict daily training. Quiet transfer student Ethan notices her persistence and coaches her every dawn on the rooftop. Through constant exercise and self-discipline, Ella slims down drastically, tops her grade and breaks school running records. She calmly confronts the bullying pair, repeatedly turning down Noah’s belated advances. After graduation, Ella enters top university with a full scholarship. On the old rooftop where they first met, Ethan proposes to her. She finally gains self-worth and true love instead of seeking revenge on those who once looked down on her.
