Even for truly wealthy men, the greatest wish in life is to once again acquire a youthful body. Mister Steel has chosen Lupin III as the destination body for his brain transplant. The procurer is, of course, Fujiko. After a faked traffic accident, Lupin is borne to Steel's mansion, where the brain transplant takes place successfully. The old man has only a little time left, but the brain is Lupin's. How will the brain shuffle resolve itself?