Tracy follows Evie's lead into the harsh realities of sex, drugs, and hard-edged adventure. Consumed with temptations and conflicting desires, Tracy loses her good-girl identity, greatly affecting her relationship with her mom. Partly autobiographical, Thirteen was co-written by Hardwicke and actual 13-year-old Reed, who are close family friends. Originally intending to write a teen comedy, they ended up creating a hard-hitting drama exposing the contemporary teenage experience.