The Hida Speedway has been completed and Lupin is looking to take top prize at the first race. The race is actually a trap designed by the Scorpion Gang who are intent on killing Lupin and eliminating all criminal competition.

Fujiko has stolen something from a man named Pycal, and he wants it back. Pycal is a magician who is able to shoot flames from his hands, walk on air, and deflect bullets with ease. Lupin goes up against Pycal in hopes of saving Fujiko. (Pycal first appeared in chapter 7: "Magician" of the original manga series.)

A boat collision ruins Lupin and Fujiko's quiet boating expedition. They discover a woman named Linda in the other boat just as gunmen on a larger boat attack them. After avoiding the gunboat, they learn that Linda is the assistant to a world-renowned expert on nuclear fission. She lived on an island with the doctor, which also housed the "Kirein Killers" ("Killers of the Sea"). Lupin and Jigen try to storm the island to save the Doctor and discover Linda's mysterious secret.

Lupin and Fujiko successfully pull off a heist; that is, until Zenigata manages to shoot Lupin with a tranquilizer dart. Zenigata hauls Lupin off to jail. Despite Fujiko's best efforts, she cannot break Lupin out of prison, and Jigen provides no help, claiming that Lupin can leave whenever he wants. One year passes, and Lupin's still in jail with his execution date getting closer. Fujiko and the others try to help Lupin get out of jail.

Goemon Ishikawa XIII is the thirteenth direct descendant of the famous samurai highwayman Ishikawa Goemon. Goemon's mentor has given him a mission; find Lupin and use the invincible Zantetsuken eliminate him. Neither Goemon nor Lupin know that Goemon's mentor and Fujiko are actually working together.

One rainy afternoon, a man seeks Lupin's help on behalf of a young woman. The woman is actually Fujiko, who is after a diamond known as "The Star of Killamanjaro". The diamond was implanted into the chest of a mob boss. This boss had his memory wiped but died days before it was to be restored. Now, Lupin and the gang are after the ambulance carrying the corpse and the diamond in it. Zenigata is in charge of the ambulance and its escort, and he attempts to prevent Lupin from stealing the diamond.