The great thief Lupin III has numerous secret techniques, one of which is the Mid-air Float Technique. The Syndicate uses a dirty method to get their hands on it. Using a fake Lupin and Jigen, they torture X8 excruciatingly, filling him with the desire for revenge, and then send him against the real Lupin and Jigen. Lupin, knowing of this plot, fixes a keepsake of X8's mother, in order to prove that he's being framed, but... What is a man's tenacity?