Twelve-year-old Corey Riffen starts a garage band with his three best friends and quickly realizes that their band sucks – like, a lot. It’s not their music. It’s Corey, he just can’t think of anything cool to write about until he finds his older sister Trina’s diary, which is full of teen angst. Corey ‘secretly’ uses her diary entries as lyrics, and the result is pure awesomeness. The only problem is that Trina can’t stand the thought of her little brother’s garbage band becoming more popular than her.