Buffalo Bill Cody and his Wild West show are in London! Wiggins and the rest of the Raven League are thrilled when they sneak backstage and meet the great frontiersman himself. But then a policeman is attacked and beaten—and the clues point to Buffalo Bill and one of his troupe, a Sioux warrior. As the plot thickens, Buffalo Bill turns to Sherlock Holmes for help, but the great detective is nowhere to be found. It's up to the Raven League to prove the Americans are innocent—but can they do it without the help of Mr. Holmes?