Isabelle Tresdon’s silver strand of hair has been nothing but trouble since sprouting: bleeding pink dust and sparking like a firecracker. When she wishes it never grew, the hair withers and tarnishes. Trouble is, it's Isabelle's source of magic, and her ticket into Mastermind Academy, a secret school inside the earth’s core. Five days remain before the strand drains her magic and life, forcing Isabelle into a deal with two trickster Masterminds to save it.