Oshiri Tantei Movie 4: Shiriarty

A mysterious intruder breaks into the Hoohoo Museum, and the trail leads to Professor Shiriarty, a criminal mastermind pursuing an enigmatic treasure known as the O-Parts. His schemes are elaborate enough to challenge even Butt Detective's famously sharp reasoning.

Joined by Audrey, a young investigator from an international police organization, Butt Detective follows a chain of strange incidents connected to Shiriarty's plan. The case soon grows beyond a museum theft, placing the entire town in danger and setting detective against mastermind in a battle of deduction and traps.