An obsessively meticulous mystery writer with a penchant for analogue technology is found poisoned in a sealed room. Meanwhile, the police department is shocked when they spot a ring on Sato's finger.
Visiting a rock musician with a demonic stage persona for an autograph, Conan and the Junior Detective League realizes that he has moved undetected through the building and committed a murder.
A man accused of a hit-and-run whom Eri is defending in court, suggesting that the man's wife is responsible for the crime, falls from his apartment to his death in front of the prosecutor and the wife.
Conan and Heiji reminisce about the first time their paths crossed, three years ago at a ski resort when an actor was found dead in his ski lift chair in a way identical to that of a stunt man at the resort four years earlier.
