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Chen Shi, his father is a knife maker, and he is good at forging knives. Until one day a group of uninvited guests came to his house and snatched the ten remaining demon knives from his father's hands. They also witnessed his father die in front of him, so he picked up the last demon knives and embarked on a path of revenge.

A Japanese detective quickly became famous after helping the police in Hokkaido solve a snow demon murder case, and later became the police's right-hand man. Known as Japan's Sherlock Holmes, he is also a rich man and the richest detective.