Davina Gonzales doesn't think she's anything special, even though her uncle is a world famous detective. She and her friends Fabiola and DeBrina are like most seventh-grade girls in rural California. But Davina's life takes a strange twist when she gets an old radio for her twelfth birthday. It runs without electricity or batteries. It always plays her favorite songs. And it warns her that if she doesn't solve a mystery her best friend will die The radio gives out riddles and puzzles to help her solve the mystery. Follow the three friends as they race against time to crack the clues and save DeBrina.