Continuing from the last episode, Shinichi and Ran found the monitor panel with the date 27 May 2010. The case starts in a ramen shop where Shinichi and Ran were watching a fight between Noguchi Miki and Yuri at their father's funeral since Sonoko attended it since her dad was a close friend with him. Suddenly, Ran receives a call that Sonoko's been kidnapped. As soon as they arrived at the Hyogoro Ramen Headquarters, they were briefed by Miki that she got an anonymous call that her sister has been kidnapped along with Sonoko and demand 10 billion diamonds for their lives. Once they fulfilled the demands and oddly the diamonds disappeared without the kidnapper appearing, they receive a letter inside the box that they've received it and will release the hostages at Beika's Central Park and later directed them to the Headquarters underground depot. As soon as they rescued the hostages, they realize that Miki was strangled to death when they left her. After further investigation, Shinichi figures out that Miki was the true kidnapper to have the diamonds for herself however, Yuri murdered her sister since she was in cahoots with her plan. The proof is that one of the assistants picks up a bead that happens to be from Miki's necklace during the rescue in the underground depot. Yuri confesses however she told him that Miki was the one who plans it and probably left a dying message before she dies. Shinichi notices a strange sound at the air vent and opens it, as countless diamonds falls off from it. Shinichi keys in 'Diamond' and the balloon deflates a bit and explode. As the both enter the next room, they feel a bit of electric shock and they both realize if they don't solve the next panel, both of them will be electrocuted.