The Secret Bureau: I Solved the Taboo Case in the World

When the dusty folk taboos are reawakened, the mystery that has been hidden in the market for hundreds of years comes to light. The protagonist accidentally takes over a seemingly ordinary old case, but is accidentally involved in a puzzle composed of "ancient rituals", "forbidden tokens" and "lost villages". As the investigation deepens, he discovers that behind every death, there is a folk past that has been deliberately buried - those taboos that have been dusted by time are knocking on the door of modern cities again in the most terrifying way. He must peel off the layers of disguise and find the truth while abiding by the rules, otherwise, he will be the next one to disappear.