In the stinking mud of a great tidal river, a body lies half submerged. Sir Tommy Best, adored British actor, has fallen to his death through a hole in the walkway above. The saintly Sir Tommy was friend to the starving & penniless, to kings & stars. He was also totally blind & reliant on his brilliant guide dog, Suzy. But she is nowhere to be found. It seems unimaginable that Suzy would have led him into danger, so is it murder? & where is she? When she finally turns up, it is only to deepen the mystery. She is stressed & tense & soon Chief Superintendent ' Fatso' & Detective Chief Inspector Ned realise that only one person in the force can possibly help. Kate, police dog handler extraordinaire, known affectionately as the Dog Tart, suggests they find Nick Parsons, who trained Suzy, in the hope that he can get the dog to lead them to the truth. The search for Nick Parsons culminates in a highly unusual plan, in which Ned will become blind for one night & with Suzy the guide dog, re-enact Sir Tommy Best's last fateful walk. The truth which they uncover is utterly horrible.