Special agent Qiao Ying accidentally reincarnates as a bullied fat girl, yet hides astonishing strength. Relying on her super-strong wisdom and agent skills, she resolves crises and solves difficult problems at school, attracting special admission attention from Tsinghua and Peking Universities. Facing her family's misunderstanding and classmates' mockery, Qiao Ying is determined to change her destiny. Not only must she lose weight and shape up, cure her younger brother, but she also needs to turn the tables on campus. When she publicly confesses to the school hunk yet decisively rejects him, everyone is shocked. During an exam storm, Qiao Ying even cleverly proves her own innocence, making the teacher who framed her reap what she sowed. What kind of secrets does this seemingly ordinary girl still hide?