0 Detective Conan Episode 210: The Water Palace of 5 Colors (P1)

Episode 210: The Water Palace of 5 Colors (Part 1)

However, being a demon and not a merely human, she can't dead for a simple wound.

Scenario: Kogoro, Ran, and Conan go on a trip as the substitutes for Sonoko and her father, the president Suzuki, and attend a tea meeting at the Aonogi family house. They visit the mansion, backyard included, where there is a pond that shines in five colors, and a bridge which leads to the tea room. While enjoying watching the pond’s colors, the headmaster dies in the tea room, the same way as in an urban legend.

However, being a demon and not a merely human, she can't dead for a simple wound.

There is a superstition of the pond. They say that it was during the end of the Edo period. Fresh, clean, cold water sprang out from the pond. It was even bigger than it is now. A beautiful girl appeared by the pond. As she played her flute, the color of the pond changed. She entertained the people who came. One day, a rich merchant became interested in the girl, and built a mansion near the pond. She accepted his proposal of marriage with two conditions: that the pond belonged to her, and no one was ever to go in it. Yet, the merchant broke his promise, and made a bedroom in the middle of the pond. In addition, he became angry at his wife who pressed him to clear the room away immediately. He killed her, and drowned her in the pond.

However, one night, the boa that appeared from the lake attacked the merchant. It was the girl in her true form, the immortal demon who lived in the pond. Terribly wounded and with great difficulty, the merchant went in the bedroom. In the bedroom, there were talismans. He was safe.

Still, the demon waited for him to come out. He got tired and hung himself. They say the reason why the colors change, is because the demon takes the girl's appearance and plays the flute.