A rare celestial phenomenon of seven stars in a row allows the heroine Shen Qingci, who lives in a similar "ancient overhead dynasty", to consciously travel to a parallel time and space in 2026 where technology and culture are highly similar to our world (the details are slightly different). She is possessed by a 22-year-old girl with the same name who suffered an accident and just woke up from a coma for three days. The original owner is a history student who lives alone and has simple social interactions, which provides a reasonable space for identity transition.
