On the day he was canonized as crown prince, Pei Jingheng received a gift - the bionic center "Tianshu No. 1". She has no name, no past, and her only command is to always obey him.
But this machine bleeds, is afraid of thunder, and sings a song that only he and the missing girl know.
Thirteen years ago, he lost someone; thirteen years later, she came back to him as if she didn't recognize him. Pei Jingheng thought this was a belated return of fate, but he didn't know that some reunions were never gifts, but a carefully buried sacrifice.