In Bloomsbury, London, Inspector Brook of Scotland Yard looks down at a dismal scene. The victim of a ruthless murder lies burnt beyond recognition, his possessions and papers destroyed by fire. But there is one strange, yet promising, lead - a lead which suggests the involvement of a skier. Meanwhile, piercing sunshine beams down on the sparkling snow of the Austrian Alps, where a merry group of holidaymakers are heading towards Lech am Arlberg. Eight men and eight women take to the slopes, but, as the CID scrambles to crack the perplexing case in Britain, the ski party are soon to become 16 suspects.