Fujiko dies in Lupin's arms. Lupin flips out, but it's all a put-up job: having heard, at the last, the location of Lupin's most precious treasure, Fujiko teams up with the villain Helgar. An extremely angry Lupin takes off after them, but an almighty Minotaur defense system awaits at the hiding place, on the island of Crete. Helgar himself developed this transforming weapon. What is Lupin's treasure?

A romantic night means a flight to the moon. For Fujiko, who tells him she wants to take a flight to the moon, Lupin decides to borrow the mass-popcorn-producing machine developed by Professor Pancho. NASA, however, doesn't buy it, because their prestige will be ruined if it is shown that the moon can be reached that easily, and take the Professor and his wife into custody, in an attempt to stop the launch. After various events, the countdown begins at last.

A nationwide warrant is out for Goemon, who not only robbed a bank but also stabbed a security guard to death. The Zantetsuken in Goemon's hand has none of the blood-clouding on the blade that would indicate stabbing a person. This is the work of Goemon's archenemy, Nidaemon. There are two Zantetsukens, a male and a female variety. According to tradition, unless the two blades lay together once every 300 years, the larger, male blade will lose its potency. This time is Midnight straight up. Will the disgrace be cleared up?

Lupin and company pull off a string of bank robberies in one evening, but Lupin's objective is to buy the only Great Golden Swallowtail Butterfly in captivity at auction. This butterfly has the ability to detect gold veins. Maniak, winner of the auction, leads an armed troop who destroy the environment in their search for gold. Their acts of trampling the butterfly paradise under their feet is unbearable. Will nature be avenged against such brutality? The butterflies' eyes light up.