Yue Rou had always attended a school for the royal family and was raised under the protection of Hei Long. She practically considered herself part of the royal family, never imagining that she would one day end up on a list of spies.
Hei Long, with his status, could have prevented this from happening, but he didn't. This made Yue Rou despise him even more.
From then on, she left her university life and entered a spy training camp.
Having learned self-defense from Hei Long since she was young, the initial spy training didn't prove to be too challenging for Yue Rou.
However, as the training advanced with all sorts of perverted methods, some cadets couldn't bear it and even committed suicide.
Yue Rou endured nearly three years of painful training.
During that time, Hei Long would visit the training base once a month. Nobody knew that she had once been his personal maid, the person closest to him.