Eri goes to a hairdresser to get her hair done. Conan and the others come across a dead body outside. Conan finds the woman who did Eri's hair to be the killer, but with Eri as her alibi, it makes it difficult to prove she did it. What was the trick used in order to carry out the crime?

Sonoko, Ran, and Conan once again meet up with Eisuke. They go to a karaoke spot. On their way there, they are followed by a man with hat and sunglasses. Later, this same man turns up dead at the spot, and Conan finds Eisuke to very suspicious. Is it possible he had something to do with the murder?