At an alumni dinner at Magdalen College, University of Oxford, an important local politician collapses dead. He has been poisoned, but none of the guests at his table claim to have seen anything. During their further investigations, Inspector Heidi Green and her new colleague Frederick Collins from Thames Valley Police encounter a wall of silence. One thing is certain: some of the alumni are hiding a dark secret from the past. Soon, there is a second body. An Oxford crime story with surprising twists that offers insights into the world of the historic university city of Oxford.