Professor Cobalt, proprietor of the Cobalt Clinic, has his advertisement turned down by the Daily Planet because it makes spurious claims. Clark runs him out after Cobalt gets aggressive with George Taylor. George gets Clark and Lois to investigate the clinic for an exposé.; Zatara and Tong are in the far north searching for the Jagtooth Gold Mine he has been commissioned to find. At a cabin beset by the plague, Zatara gives the inhabitants medicine and asks them about the mine. They say that the mine is guarded by a vicious man, Tony, whom Zatara will have to defeat to return the mine to his friend, Henri Jardine.; Since Gargantua T. Potts joined the French Army, Tex and Bob find things pretty dull, but a phone call threatening death if they mix in with the new prosecutor, Maloney, gets them set on a new investigation. Maloney deputizes them to help sniff out rackets. Working on the case, they are helped by the mysterious Miss X.; On a hunting expedition to Saskatchewan, Canada, Pep and his friend Pierre are snowed in and must traverse hundreds of miles to get to the next outpost before another storm.; Looking for adventure in California, Gunner encounters a crying girl, Ingrid Svensen, in a diner. She needs an flight to New Guinea to retrieve pearls from on top of Devil Mountain, pearls that her father left to her in his will. Once there, the Three Aces have to figure out how to help Ingrid get the pearls.; Clip runs into Marion Trent in New York City and ends up helping her get to her father's cabin in the Hudson Bay area. Her father found a lode, and Jacques Frontenac and his spies are after the location.; The Black Pirate is trapped in a shark-infested sea. After fighting them off, he is picked up by another ship, run by Captain Courtney. When they dock at Savannah, Jon Valor leaves town on horseback. He meets up with a childhood friend, Jeanne, at an inn. That night, a bearded intruder comes to the inn and demands the Black Pirate.