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?