Zenigata gets the story this franchise never gave him, and the film earns every frame of his moral collapse. The Koike aesthetic turns interrogation scenes into visual suffocation, heavy shadows, sickly greens, a color palette that makes justice feel contaminated. It's a prequel that works as standalone precisely because it trades the old Lupin charm for something colder: a man discovering the person he's been chasing might not be the monster he needs him to be.

A bombing strikes an airport in the icy Roviet Union, and the suspect turns out to be Lupin III. When Zenigata corners this other Lupin, the man insists he is innocent. Zenigata, who stands firmly for justice, must deal with a mysterious fake Lupin, a conspiracy that reaches the national level, and the real story behind the attack. As the two Lupins cross paths, his convictions are tested. The one-episode ONA mixes action, adventure, comedy and mystery, and its story takes place before the feature film Fujimi no Ketsuzoku in the LUPIN THE IIIRD line.