|Japanese Title:||ウエディングイブ(Uedingu Ivu)|
|Original airdate:||September 1, 2012 (Part 1)September 8, 2012 (Part 2)|
|Manga source:||Volume 75: Files 9-11 (793-795)|
|Case solved by:|
|Next Conan's Hint:||Cake (Part 1)Mirror (Part 2)|
|Technical Director:||Yasuichiro Yamamoto|
|Animation Director:||Kenichi Otomo
|Prev episode:||The Rainy Night Menace|
|Next episode:||The Dark Tower's Hidden Treasure|
At Ristorante Sundayrino, Kogoro, Ran, and Conan are invited by Kogoro's friend, Raita Banba, to attend his pre-wedding party. Banba's bride, Hatsune Kamon, leaves to have her nails done. Shortly on her return, she receives a phone call at the parking lot that shocks her. She calls Banba, bidding him farewell, and her car is engulfed by fire.
The police arrive and their DNA test reveals a rough match of Banba's DNA was found on Kamon's nails insinuates him as the murderer. Banba proclaims innocence and reveals the culprit is most likely Tooru Amuro, their waiter who has secretly met with Kamon. Amuro explains he was hired by Kamon to investigate Banba and see if he was having an affair; To attest to his alibi, Amuro reveals Banba also hired a detective to follow Kamon for the same reasons. The detective confirms Amuro's identity and leaves Banba as the main suspect. Conan investigates, finds out that Kamon was making secret phone calls, and learns from Amuro that she was disturbed to discover Banba and her were orphaned by the same hotel fire.
A second DNA test with sterile samples reconfirms the rough DNA match leading Conan to a conclusion.
Raita Banba and Hatsune Kamon are actually twins separated after an accident when they were babies. The murder is actually a suicide. The stick-on fingernails of the victim had shin on the tips with a DNA rough match to Banba, making him the prime suspect. What proved his innocence was the cake stain on the sole of his shoe. If he had gone outside, the cake would have washed away. The rough match also proved that Hatsune and Banba were twins in a church when they were little, but didn't find each other until adulthood. Hatsune wondered this so she had a DNA comparison done by a doctor and the results proved the two were brother and sister; seeing no turning back, she ended where it began: in the fire. Following the resolution, Tooru Amuro asks to be Kogoro's apprentice, even promising an unspecified tuition, that causes him to joyfully accept.