Everything Martin touches is literally turning to gold. Tim is excited, but Martin isn't as it's a symptom that he's not well - he has a gold deficiency in his diet. In addition, he has to be careful what he touches. To fix his problem, Martin figures he needs to eat something that has been grown in gold enriched soil. Where a better place to find such than the area outside of Fort Knox. Martin enlists Tim's help in going to Fort Knox to pick up some greens growing by a stream that runs close to the gold vault. But before Tim can head off, the boys unavoidably have dinner with Mrs. Brown and Det. Brennan. During which, Martin is good, not touching anything, that is until just before he leaves, when he touches his dinner roll. When the detective finds a half burnt piece of paper of a floor plan with the letters "NOX", the fact that Tim is leaving on a flight at 8:30 - a flight to Fort Knox does leave at that time - and the gold dinner roll, he puts two and two and two together. On doing some spying, he sees, touches and tries to lift the gold furniture in the O'Hara apartment; he figures they are smuggling gold out of the country disguised as furniture. Tim arrives home with the greens just in time to cure Martin's gold deficiency. But can Martin change the furniture back to wood in front of the detective and before the rest of his police back-up make it to the apartment?
—Huggo