The story begins at Mica Area High School,where everyone is normal. Until Leo's first day. Everyone was talking about the new girl named Stargirl Caraway. She isn't ordinary. She wears old clothes and has a pet rat.
After the football game she gets invited to be a cheerleader and she becomes popular. Leo and Stargirl start hanging out.
But then, sadly her enthusiastic cheerleading leads Stargirl downfall of popularity. Everyone starts to give her the silent treatment. Then Leo noticed that he was also being ignored so he tells Stargirl in order for them to stay together she needs to change.
Stargirl changes herself into Susan. She tries to act and be normal for Leo and everyone else. Leo trains her to be like everyone else.She later finds out that they still don't accept her.
Eventually she becomes herself again. Stargirl accepts the fact that Leo doesn't love her for who she is. So, she decides to go to the Ball by herself. Soon after she becomes popular again.
After the Ball, Stargirl disappeared. It was the last anyone saw her.