Lin Ye, a postgraduate archaeology student, encounters an eerie blue light while examining a Zhou-era star chart. When he wakes, he finds himself in the body of Ryan White, an international student in the Kingdom of San Lorenzo.
While sorting through his belongings, Ryan finds contradictory diary entries suggesting that his predecessor may have been involved in a dangerous research project. He also notices something strange about the pocket watch he carries.
Using the timetable and map from Three-Leaf Clover Academy, Ryan realizes this is a world much like nineteenth-century Europe, except it has a double-moon sky. He also senses that people are deliberately avoiding any mention of the “Seventh Constellation.”
