Since the secret compartment bed is impossible to fold down without the knob, René rings for monsieur Alfonse to come with his tools to try and open it. After listening through the wall with a stethoscope and having drilled a small air hole through it, monsieur Alfonse decides to put small dynamite charges at the hinges of the bed and blow them off. While René goes to ask Michelle for some dynamite, Edith decides to feed the trapped couple by pouring soup into the air hole.