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Twins Li Mengshang and Li Zhongxing accepted the invitation of high school classmate Amy to travel to Germany during the holidays, along with Amy's other friends. A group of people accidentally saw a castle on the road. After visiting it, they fell into a chaos of time, continuously and randomly traveling to a certain time point in the past four hundred years. While looking for a way to leave the castle, they encountered various dangers and incredible events, and gradually discovered the truth about the constant jump of time and the dusty past of this castle.