Mr Albert Brown, accompanied by his friend, travels from America to Prague to visit his stepsister. Chaos erupts when Mr Albert goes to walk his dog and both suddenly vanish. The case is entrusted to Lieutenant George Klamert from the criminal investigation police, who invites his consultant and a private detective Adrian Lese to assist him. What first looks almost like a common misstep develops into a very complicated murder case rooted in the distant past. The story full of twists and thrill, spiced with subtle humour, leads step by step to the resolution of the whole case.