After her grandfather's death, Lu Xiaoxiao, a girl living in the 23rd century, lives alone in the villa her grandfather left her. Despite being abandoned by her parents and relatives, she suddenly discovers a secret space within the jade pendant her grandfather left her. Fearing the impending apocalypse, a novel lover, she desperately hoards possessions. When her money runs out and she's about to take a break, she wakes up and is reborn in a place resembling China in the late 1950s. She's reborn as Lu Xiaoxiao, an 8-year-old girl with the same name and surname, both of whom have passed away. Fortunately, the secret space has been brought with her, allowing her to live a comfortable life in this unfamiliar era. (This is a one-on-one romance story with a virtuous male and female protagonist, so feel free to dive in.)