Father Gabriel spends a few days of relaxation at his old Cambridge College, the guest of friend Arthur Kingsley from his student days. Kingsley is now a respected scientist and a Fellow of St Stephen's College, but after an enjoyable evening dining at High Table, Gabriel receives the shattering news that Daphne Silverton, Kingsley's brilliant young prot?g?e, has been found dead in her laboratory after what appears to have been a tragic accident...