They Do It With Mirrors

Miss Marple senses danger when she visits a friend living in a Victorian mansion which doubles as a rehabilitiation centre for delinquents. Her fears are confirmed when a youth fires a revolver at the administrator Lewis Serrocold. Neither is injured. But a mysterious visitor Mr Gilbrandsen is less fortunate - shot dead simultaneously in another part of the building.Pure coincidence? Miss Marple thinks not and vows to discover the real reason for Mr Gilbrandsen's visit.