Heiji and Kazuha are back again in this case. Kazuha still isn't convinced that Ran and Heiji aren't together and is quite suspicious at first, but soon becomes friends after Ran changes her clothes just for Kazuha. Meanwhile, Heiji and Kazuha are there for a wedding while Kogoro, Ran, and Conan were invited as guests. Running into the bride-to-be at a temple, her tears strike curiousity for our two detectives, especially when a murder is made that evening. But why is there a trail of blood leading to the next room with the dead body? And how did the window break if nobody was there? What is the secret to this secret room? It's up to Conan and Heiji to find out! And maybe Kazuha's claim of the "same" can help them out more than they know.