Meet Garvie Smith. Highest IQ ever recorded at Marsh Academy. Lowest ever grades. What's the point, anyway? Life sucks. Nothing ever happens. Until Chloe Dow's body is pulled from a pond. DI Singh is already on the case. Ambitious, uptight, methodical - he's determined to solve the mystery and get promoted. He doesn't need any 'assistance' from notorious slacker, Smith. Or does he?

Garvie's exams have started, but so has another mystery. A kid got shot last night, a kid from Garvie's school, and Garvie thinks he can work out who did it quicker and better than the police. He'll go to any lengths to find his answers.

Amy Roecastle is beautiful. Selfish. And missing. Vanished without a trace in the middle of the night, she's taken her ferocious dog - and something else, too. Something deadly. Amy's best friend is lying to Inspector Singh, who has no leads and no idea. Cue Garvie Smith. Teenage slacker. Undeniable crime-solving genius. Garvie's one step ahead of the investigation. But there's nothing simple where Amy is involved. And this time Garvie's about to find himself in way over his head.