The blue Mercedes was parked on a remote hillside in Switzerland. A young Police Lieutenant lay slumped dead at the wheel … In his search for the murderer, the brilliant Commissioner Barlach finds himself pitted against an old and elusive enemy. For forty years, the two shrewd men - one a master criminal and the other a great criminologist - had matched wits and crossed paths in all the major capitals of the world. Now, time was short, and Barlach knew there was only one sure way to trap the brutal killer.