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An Jiameng, a female criminal auxiliary police officer, fell into a time tunnel due to a car accident. Once she traveled through time, she arrived at the scene of a shocking crime involving a half-headed person in the ancient Taikang Kingdom. Because she looked exactly like An Guogong's daughter, she was mistaken for Miss An, and was rescued by An Guogong's cronies Zhanyan. There happened to be a murder where she was. Frightened and relying on her excellent psychological quality and professional knowledge, she began to assist Zhanyan in solving the case and show off her skills...