Ghost Leader (2020)

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Rumor has it that as soon as a person encounters a "ghost leading the way", people will have a blank brain and lose consciousness, but their feet will keep walking. This is what people call being led by a ghost. People who encounter "ghosts lead the way" will eventually be taken to some terrible places- graves, underworld and more. That happens to Song Wan Rong, which, after losing memory, for some reason, is led by the ghosts to the cemetery. What is the reason for this?