Lupin III, a bored junior high schooler in Tokyo, takes an interest in a young Daisuke Jigen, a mysterious and impressive marksman. Lupin III strikes up a conversation with Jigen at a nightclub, however during their talk, Jigen concludes that Lupin III is simply a privileged and naïve boy from a well-to-do family and doesn’t want anything to do with him. However, while helping the nightclub singer Yoko, who is being pursued by the yakuza, Jigen learns that Lupin III is a descendant of the legendary thief…