Lu Renjia joins Onion Academy as an intern teacher.

On the eve of her employment, her childhood friend and elder brother, Wu Qi, suddenly goes missing.

While searching for Wu Qi, she gradually discovers another soul residing in her body... Who are they? And who am I?

She is fortunate to have companions from the academy fighting alongside her, as she unravels the mystery of her identity, confronts conspiracies, and reveals cruel hidden truths.