Setting his sights on the large medallion on Generalissimo Hutler's chest, which contains a 50-carat ruby, Lupin should have been able to take it easily enough, using his special rod-and-reel technique, but ends up exposing the Generalissimo's secret toupee instead when the wind blows the hook on his fishing line over Hutler's head instead of the jewel. The infuriated Hutler orders that Lupin and company be wiped out, and in the face of the attack by his combined armed forces, a wounded Lupin makes his stand in an old castle with Fujiko while Jigen and Goemon attempt to save them.