یک قدم عقب تر

It is Midsummers Eve. Three young friends meet in a wood to act out an elaborate masque. But unknown to them, they are being watched. With a bullet each, all three are murdered. Soon afterwards, one of Inspector Wallanders colleagues is found murdered. Is this the same killer, and what could the connection be? In this investigation, Wallander is always, tantalisingly, One Step Behind.