In a vast interstellar empire, a young girl from a desolate planet dreams of honing her incredible skills and making her fortune. Song Chunshi's amazing marksmanship and martial arts prowess earn her a coveted spot at the Imperial Military Academy, despite her humble origins.

Targeted by arrogant aristocratic rivals who underestimate her, the "Passerby Girl" must navigate the Academy's cutthroat competitions and grueling training regimen alongside loyal friends and frustrating foes. Instructors like the stern but supportive Carol Nofi push Chunshi to cultivate her inner power and unlock her full potential through ancient martial techniques. Meanwhile, Chunshi makes plans to join rich buddy Allen Garcia's family star beast hunting business to earn some much-needed cash.

But Chunshi's path to glory won't be easy, as she clashes with entitled scions Irman Martino and Anton Brennan, prodigy Wu Lanshuang, and the Academy's demanding drillmasters. Luckily, with her tireless work ethic, razor-sharp mind, and a few clever tricks up her sleeve, Chunshi just might graduate from a "barbarian" to a legend.