Bai Yue Kui, a mecha agent from the Federation Military Industry Institute, unexpectedly travels through time and space, becoming an eighteen-year-old girl abandoned on a garbage planet. Possessing extraordinary combat skills and powerful mental abilities, she saves Ji Heng, a badly injured man whose identity is shrouded in mystery. To heal him, she modifies scrapped mechas and ventures into the wasteland overrun by alien beasts. After gaining admission to the Sixth Military Academy, she disguises herself as an F-rank freshman at the bottom of the class. However, with a perfect score on her theoretical exam and astonishing piloting skills, she repeatedly turns the tables, defeats the schemes of wealthy heirs, and leads her teammates to victory in the inter-academy selection competition. Determined to uncover the truth behind an old case and protect those closest to her, she sets out onto an even greater stage.