Sonoko invites Ran and Conan to attend a wedding between Shinya Ooga and Akane Katori at the Huis Ten Bosch. On the way there, the three meet a glass artisan named Junichi Takahashi who accompanies them to the Huis Ten Bosch to the glass museum. Shinya's grandmother, Tae Ooga, impressed by Takahashi's knowledge on glass invites him to dinner with the Ooga family. That night, Shinya's parents offer Akane an heirloom wedding room for the wedding and invite Takahashi to attend the wedding. Before the wedding begins, the ring is found missing and in its place is a picture of Akane with Hydrangea Otakusas in the background. Conan realizes that the flower refers to Philipp Franz von Siebold's Japanese wife, Taki (??, lit. Waterfall) and finds the ring on a flowing fountain depicting the ending to Greek mythology Cupid and Psyche. Conan soon learns that Akane has been kidnapped and finds her in a carillon in the amusement park. She reveals that Takahashi plans to kill her grandmother-in-law by using bombs in her blimp. Conan manages to incapacitate Takahashi before he detonates the explosives. As Shinya's whole family gathers to the scene, Conan tranquilizes Sonoko and explains that Shinya's sister, Mika Ooga, and grandmother hid the ring to test Akane's resolve, evidenced by where the ring was found and how the situation relates to the Greek mythology. Conan then reveals that Takahashi was trying to avenge his teacher, Akane's father, by murdering Tae. Takahashi regains consciousness and explains Akane's father committed suicide when the Ooga's family bank ordered him to pay back the money he burrowed. Shinya's uncle reveals that they had delayed Akane's father's debt for a year and that the money needed to make the glass was more than the profit when selling them which furthered Akane's father's debt. Takahashi, realizing the Ooga are not to blame collapses in grief. After the wedding, Ran receives the thrown bouquet which causes Conan to run away from the wedding.