Episode 733: The Wedding Reception and the Two Gunshots
Scenario: Sonoko must go to a wedding representing her family, and since she doesn't want to go alone she ropes Conan and Ran into going with her. The groom is the eldest son and heir of the incredibly rich Hatakeyama family, and he's marrying a young woman named Miho. The wedding takes place in a very nice villa, and things go well at first until the end of the reception.
Two chefs run into the reception saying Masaru had collapsed. He is found lying dead on the ground due to a gunshot.
A second gunshot was heard after Masaru's body was discovered. Conan rushes off on the Turbo Engine Skateboard in the direction of the hotel past the river to Miho's room, but finds her dead on the bed.
Megure, Chiba and Takagi start investigating, and the darker than expected dynamics of the families start coming to the surface. There are three suspects in particular: Miho's brother and only relative Yoshifumi (who is knee-deep in debts and desperately needed to pay them off), Masaru's older sister Rikako (who had always resented him for being the leader of the family despite her being the eldest), and Masaru's cousin Arisa (who was in love with him and very jealous of Miho). In the meantime Conan starts snooping and asking around, getting hold of the info he needs to see which of the three is the killer.