When a gang boss and a death-dealing arms merchant join forces, nothing good is certain to come of it. They set their sights on Zantetsuken, which can cut even tanks in half, get Fujiko to steal it for them, and transform it into an invincible flying weapon of war. Meanwhile, Lupin and Jigen head to Central Africa to get Zantetsuken back for Goemon, whom they have left with Zenigata, as he is determined to die, seeing no other path for himself now that he has lost his warrior's soul. Does Zantetsuken have a weakness?!