In Austria, during the XVII century, the inventor Wolfgang Von Kempelen built for Queen Maria Theresa an extraordinary automaton dressed like a Turk, who was able to play chess and defeat every adversary. Nobody managed to ascertain how it worked, because the machine was destroyed during a fire in 1854. Nowadays, a copy of the automaton, created for an exhibition, is targeted by an attack. Why? Inspector Travis thinks it’s not just a case of madness, and involves the Detective of the Impossible in a situation that will reveal itself to be an intricate mystery.