Milky Holmes stops taking itself seriously and just commits to chaos, the way the series always should have. You get three teams of incompetent detectives and thieves colliding at a hot spring, each one convinced they're the actual protagonists, each one spectacularly wrong. The comedy lives in that collision, nobody here is competent enough to win, so watching them fail together becomes the entire point.
A peaceful hot spring getaway turns into chaos when Milky Holmes stumbles into a three-way collision between rival groups all chasing the same prize. The Gentlemen Thief Empire has set their sights on a valuable treasure, but the Genius 4 arrive on the scene just as tensions spike between the criminals and the amateur detectives. What should have been a relaxing trip becomes an all-out scramble for possession of the mysterious "Toys," legendary artifacts that grant special powers to their wielders. With everyone wanting a piece of the action, battles erupt across the hot spring resort. Milky Holmes faces off against seasoned thieves and brilliant rivals while trying to understand what exactly makes these Toys so valuable. The comedy unfolds as the bumbling detective group finds themselves caught in the middle of a much larger conflict than they anticipated. Expect ridiculous fight scenes, comedy that doesn't take itself seriously, and pure mayhem as three competing factions clash. This film cranks up the absurdity that the series is known for, delivering a lighthearted adventure that prioritizes laughs over logic.