Modern Comics #67 (1947)

In "The Plateau of Oblivion!", Blackhawk uncovers a chilling mystery tied to the ghostly ship *The Grey Ghost* and the brutal murder of its crew—leading him into a hidden world where Dr. Mendoza's twisted plans hinge on half-human creatures from a prehistoric plateau. As the war-torn skies above give way to forgotten jungles, Blackhawk must navigate a realm where ancient threats now loom over the modern world.