Medical girl Shen Zhaowei entered the Medicine Department to investigate the cause of her sister Shen Zhaoyue's death. On the first night after entering the palace, she found a corpse in the medicine cabinet. The non-existent "Purple Poria" links the murder of the emperor's heir and the theft of tribute wax to the old case seven years ago. The young emperor Rong Heng knew that she had entered the situation under a false name, but deliberately pushed her to be the murderer. Within the palace walls, everyone lives by borrowing the names of the dead, and the book that never records medicines, but only records people, is waiting for the next writer.
