Heiji Hattori and the Locked Room Unseen Weapon Murder Mystery! The East-West Detective Reasoning Battle

Osakan high school detective Heiji Hattori and his best friend Kazuha Toyama are on their way to visit Teitan High School when they witness a thief steal a purse. Heiji chases after the thief only to run past Shinichi and Ran on their way back from school. They capture the thief only to suddenly hear a woman scream in a nearby house. When owner Yoshino Fujimaru gets home and lets them in, the three are surprised to find Hideko Nakajima dead on a couch with a shard of glass protruding from her neck.