Lupin III: Part 6

Synopsis

In the Shigetomi department store circa 1930, Goemon slashes wildly at Lupin who manages to escape while remarking that his sword is not Zantetsuken. Colonel Daidoji and Major Hongo arrive and snatch the key to the automaton clock from Sarantuya, who is also later revealed to be the heir to the Altan Khoto Kingdom. Daidoji's plan is for the Imperial Japanese Army to instill a puppet government in Inner Mongolia. Following a series of intersecting events, the key players in the drama, Ruriko, Sarantuya, Akechi, Black Lizard, and Lupin, find themselves surrounded by high mirror-like panels with a type of control panel in the center. Lupin enters a code and the group suddenly end up back in the automaton clock room, where he reunites with Goemon. Lupin finally remembers the truth: he and Goemon had infiltrated a modern research facility, but became trapped inside a virtual machine designed to extract the password to Lupin's hideout. He also reveals the code he entered enabled a self-destruction for the facility, forcing the researchers to free them and let them escape, as the rest of the virtual world disintegrates. As Lupin and Goemon escape, it is revealed that the facility was funded by Ruriko Shigetomi and the Showa era events were based on her memories. Later, during an excavation, a stone is uncovered showing engraved words that master thief Arséne Lupin, AKA the Golden Mask, was there in the 1930s.

(Source: Wikipedia)