Liu Ying, a second-year-old girl, was born in an extraordinary family. Her parents disappeared when she was very young. She was raised by her grandparents, who knew how to exorcise ghosts. Two years ago, when the heroine was eighteen years old, she used a secret technique sealed by her grandfather to travel through time, and then asked her grandparents to bring her back from that world. After that, her grandfather sealed her memory and forgot everything about that world.
