Rainbow wants to battle stereotypes at school after she joins the track team and feels like her friends only see her skin color. Meanwhile, Alicia and Paul battle stereotypes of their own, and Santamonica tries to be cool enough to hang out with Rainbow's friends.

Paul is shocked to hear from his estranged mother who wants to visit for Rainbow's 13th birthday and soon learns more about why she abandoned him. Meanwhile, Rainbow sees turning 13 as a huge turning point in her life and wants a big birthday party, but Alicia wants to celebrate all the things Rainbow missed out on over the years while on the commune.