Still hunting for the ruby, Paul and Barry stake out the flat of another guest, Carrington-Smythe, posing as flower sellers. They enter the flat in his absence but it is full of modern gadgetry, controlled by a panel, and they activate it all, as well as turning on the fire sprinklers. When Carrington-Smythe returns, he tells Barry and Paul that he is the head of MI7, and sends the brothers on a mission to locate the ruby,which has fallen into dangerous hands. It may be used to activate a top secret machine which would cause mass destruction and must be recovered at all costs.