The new story sees Lupin, Jigen, Goemon, Fujiko, and Zenigata embroiled in a hunt for the Bresson Diary.
“Bresson” was the assumed name of a character in Leblanc’s novel Arsène Lupin vs. Sherlock Holmes (altered to “Herlock Sholmes” or “Holmlock Shears” in some editions).
Rather, the film will take place in the mid-20th century… back when the timing worked out for Lupin to still be the grandson of Maurice Leblanc’s Arsène Lupin.