The management of Sky City, the “cosmic Riviera”, trying to keep up with scientific and technological progress, acquired a robot chef for its restaurant complex. Faced with a fact, Chef Bertram, a master virtuoso of his craft, is furious and strongly protests, threatening his own resignation. The chief administrator makes a bet with the supreme chef - if the royal guests from Callisto, arriving at the global interplanetary conference, recognize the difference in the cooking of Bertram and the robot, then the latter’s mechanical foot will never set foot in the kitchen again...