Ep. 394: The eccentric mansion adventure involves a mysterious lantern and a hidden diamond code.
Aired on April 18, 2005

394
Agasa, Haibara, Conan, Ayumi, Mitsuhiko, and Genta go camping. While they're camping they find a lantern in a pond with some writing inside. They show the stone lantern to Conan who determines that it is a code to finding a large diamond. The lantern is also hiding another secret...a dead body at the bottom of the pond. After searching the body they find out that he was a treasure hunter who was straggled to death by another person looking for the treasure. They also find a tear-shaped stone with the kanji "inflammation" written on it and a notebook. The notebook suggests that he was murdered by his partner and that Kaitou Kid is also seeking the treasure. Dr. Agasa goes back to camp to call the police.
Episodes
- Ep. 390 · Takagi faces a three-year assignment while the Detective Boys investigate a jogger suspect.
- Ep. 391 · Conan exposes the suspect's time manipulation trick involving dubbed news and edited video footage.
- Ep. 392 · Conan helps Takagi solve the murder of a construction company president involving a height discrepancy.
- Ep. 393 · Mouri Agency Investigates a Suspected Kidnapping Involving a Crash and Ransom Money
- Ep. 394 · The eccentric mansion adventure involves a mysterious lantern and a hidden diamond code.
- Ep. 395 · The eccentric mansion's mechanism presents dangers and mysteries for the young detectives.
- Ep. 396 · The eccentric mansion trap resolves as the diamond is recovered from the pond
- Ep. 397 · Mouri investigates a hanging death involving embezzlement and a complex ice-based murder method.
- Ep. 398 · The Kiriya Family Mystery and the Cold Case Connection