Seventh-grade detective Harper Madigan works alone. He doesn't need the vice principal assigning him a new partner to keep him in line, especially a stuffed-shirt wannabe-journalist. And he especially doesn't need his troublemaker ex-girlfriend showing up out the blue and asking for his help. She's accused of attacking the star of the school musical, and with her less-than-sparkling track record, she's only one suspension away from getting expelled.
Only Harper believes she's innocent, and now it's up to him to prove it, even if it means making an enemy of the PTA mafia, risking his agency, and facing the mistakes of his own dark past. But when his new partner insists on doing everything by the book, and his old nemesis - the one bully he can't catch - starts harassing his clients, it's going to take more than just detective work to solve the case.