Inspector Lewis investigates the death of brilliant young maths student Regan Peverill at Oxford University. The prime suspect is Regan's ex-boyfriend, who is convinced that his uncle has set him up, as old case papers belonging to Morse indicate that the family have a dark secret to hide.

When a middle-aged Oxford graduate is found dead near his run-down Oxford house-boat, Detectives Lewis and Hathaway are thrown into a delicate murder case which implicates one of the University’s most prominent figures – college Principal and likely Vice-Chancellor, Sefton Linn. But as Lewis and Hathaway discover, Linn was not always so respectable. As an undergraduate, twenty odd years earlier, he was a member of a hedonistic group of friends who titled themselves ‘The Sons of the Twice Born’ - and with the dead man, Dean Greely, being part of this mysterious group...nothing is as it seems.

When a bright young female student is found murdered in a hotel room, detectives Lewis and Hathaway are drawn into a case driven by celebrity, ambition, scheming and dangerous sexual politics that brings Lewis face to face with his past.

When North Oxford housewife Rachel Mallory is found hanged at home, it appears to be an open-and-shut case of suicide. But much to the chagrin of CSI Innocent, Inspector Lewis' instincts tell him something is wrong about the suicide verdict.

A body is found in the Bodleian Library and further intrigue arises when stolen books are found in the victim's home.

Professor Cole is a respected German history professor. When he is found dead it emerges that he patronised an illegal boxing club. Could his death have been an underworld killing?