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Suman returned after disappearing for three years and had already become the backbone of the international anti-terrorist organization. Because he was injured in an operation, he returned to Yuncheng to recuperate. When she lived in the wooden tomb-view villa that her father purchased earlier, she accidentally discovered the "will-o'-the-wisp" dancing in the cemetery opposite. With her sharp insight, she quickly noticed something strange. After that, she joined hands with the criminal investigation captain Zhou Yinan, who had been in love for many years, to restart the investigation into a disappearance case that occurred in Yuncheng a few years ago...