Sixteen-year-old Mafi Shahin is well-aware that life is not always fair. If it was fair, her parents might allow her to hang out with a member of the male species, other than her cat Mr. Meowgi. If it was fair, her crush and basketball hottie Jalen Thomas might see her as more than just her brother's kid sister. And if it was fair, her baba’s brother and wife would be able to leave Afghanistan and come to America.

Life might not be fair—but she can make it a bit more even. Working as the Ghost of Santa Margarita High, Mafi serves dollops of justice on her classmates’ behalf as the school’s secret avenger. They leave a note declaring the crime and Mafi ensures the offender receives an anonymous karmic-sized dose of payback. Keeping her identity as the Ghost a secret sometimes means Mafi has to lie. But as those lies begin to snowball both at school and at home, even compromising their family’s secret past and putting their relatives back in Afghanistan at risk, Mafi is forced to decide how she wants to live her life—trying to make the world more fair from the shadows or loudly and publicly standing up for what’s right.