While Conan visits Heiji, two murder cases occur during the trip. The first is of a contestant in a kendo tournament in which Heiji competes. The second is a tourist visiting Osaka Castle, who is burned alive and falls from a great height.
Kogoro gets called in as an eyewitness when Eri represents a man convicted of murder. However, when the prosecutor, Eri's rival Reiko Kujo, turns Kogoro's testimony in her favor, he and Conan reexamine the crime.
While Conan and the Detective Boys help a man look for his late wife's watch, a woman is killed with a vase just after stopping by at the man's apartment.