The Death God Jinnai Murder Case

Conan and Ran join Sonoko and her big sister, Ayako. Ayako is getting married so she's there to meet her new dad-in-law, but they witness him being murdered right outside the window! At first, the killer at first looks like Ayako's fiancé, but then they find out he's a triplet! It's up to Conan to figure out which son murdered their father.