It’s a quiet holiday weekend and the Oxford campus has emptied out. But the competition is still fierce — and deadly — thanks to a group of quiz enthusiasts who have convened to compete for a cash prize and bragging rights. Foul play is afoot when one contestant, a charming but lecherous primary school teacher, is found dead in a fountain. The campus is locked down, and Detective Inspector Lewis (Kevin Whately) and Detective Sergeant Hathaway (Laurence Fox) start interviewing the other contestants — among them Oxford academics, young mothers, students, soldiers and lawyers. Is this a crime of passion or out-of-control competition?