|Title:||The Design of Poison and Illusion|
(Doku to Maboroshi no Dezain)
|Original airdate:||April 21, 2012 (Eye)|
April 28, 2012 (S)
May 5, 2012 (Poison)
May 12, 2012 (Illusion)
|Manga source:||Volume : Files|
|Case solved by:|
|Next Conan's Hint:|
Heiji explains Kazuha went to Wakamatsu's home in Osaka per the letter's instructions where she finds a disguised person with the word "EYE" carved into the bathroom tiles. The person causes a blackout, sneaks away, and the carved words disappear. Heiji elaborates that Wakamatsu was murdered in his bathroom in Karuizawa, Nagano and that the culprit was hinting a dying message had been left on the tiles. Heiji and Kazuha has Kogoro, Ran, and Conan join them to interview Wakamatsu's widow and close companions who were in his home on the day of his death. During the interview, Ikuro Wakamatsu, the victim's son, dies after eating a poisoned baumkuchen.
The police arrive and their investigations reveal the baumkuchen was cut evenly into eight pieces and that only one of the piece was poisoned. As police interviews the suspects while the widow, Serika Wakamatsu, is excluded since she was never close to the baumkuchen tray. Meanwhile, the police detectives in Nagano reveal to Heiji that Wakamatsu's killer reorganized the bathroom tiles to hide the dying message; The tiles used the crazy diamonds optical illusion giving the impression that it could not be rearranged without breaking the pattern. When arranged back to normal, the message reads "SON" indicating Ikuro was Wakamatsu's killer.
Conan and Heiji resume their investigation while Ran and Kazuha gossip about Shinichi's confession towards Ran. Conan and Heiji discover powdered poison on Ikuro's doorknob and Serika's slippers; the evidence indicates her as Ikuro's murderer. The two confront Serika whom is found dead in her office from cyanide poisoning. Wakamatsu's secretary, Satake Yoshimi, reveals that per Serika's will, a letter of confession to Wakamatsu's murder is to be given to the police upon her death; the letter confirms Ikuro was the murderer and Serika's role in hiding the dying message.
Conan and Heiji's investigation leads them to realize how Ikuro and Serika were murdered. They reveal that when two pieces of the baumkuchen were left, they were rearranged using the Jastrow illusion and applied poison to the seemingly larger piece. For Serika's murder, the same culprit used the Gestaltzerfall phenomenon while she was signing contracts. This caused her to forget how to write the Waka (若?) kanji forcing her to open a dictionary to the Wa (わ?) pages where poison was applied. They reveal the culprit to be Satake, evidenced by the shine on her bronze watch due to a chemical reaction with cyanide. Satake confesses to the murders and explains it was to avenge Wakamatsu who was secretly her father. In the aftermath, Kazuha attempts to confess her feelings to Heiji but fails when he leaves partway.