A mysterious gem known as the "Skull Stone" is rumored to reveal the location of the world's largest gold vein. This legend has captivated many seeking fame, power, and wealth, including the show's villainous trio, the "Dorombo Gang." However, their pursuit of the Skull Stone proves more difficult than anticipated, largely due to inaccurate information from their leader and, above all, the interference of the righteous duo known as "Yatterman"!