DCI Ross Tanner of the Specialist Elite Murder Unit realizes he is losing his sight.

DCI Tanner and company try to work through an ever-growing list of suspects for the murder. Tanner suspects that Matthew's stepfather, Adam, is hiding something.

The case grows ever more complex, as Tanner's eyesight continues to diminish.

Tanner and Tully have a surprising breakthrough about Matthew's stepfather.

Tanner investigates an unsolved case of a murdered violinist, whose young son had been found next to her body.

Tanner decides to recreate the scene of the vicious murder of Vicky Ingham.

Despite his failing vision, Tanner investigates the murder of a young man whose girlfriend is the prime suspect of the deed.

Tanner continues to struggle with hallucinations as well as a terrifying recurring dream.

Retired underworld legend Harold King has an unsettling theory about the motive of the murder of a black community leader.

Tanner is drawn further into the world of organized crime in his quest to find Ben Harris's killer .