Wren Zhen was made obese by her twin sister Hattie Zhen's Fat Transfer System, suffered humiliation, and starved to death. Reborn, she binds a reverse self-discipline system, steadily loses weight, while Hattie grows thinner. Wren collects evidence to expose Hattie's bullying and system harm. After Hattie suffers a mental breakdown from the system's backlash and falls to her death, Wren breaks free, completes self-redemption, and moves toward a new life.