Soon after celestial omens foretell the downfall of the Tang realm, a rebellion spearheaded by crown prince Li's own sibling assassinates him along with his consort and offspring. Princess Yongning, Li's daughter, escapes initially but is later declared dead with her kin. Consumed by fury, she vows vengeance, assuming the guise of a young male named Li Chang Ge, and journeys to Shou province to pursue her aims.
Li Chang Ge employs intellect to earn the Shou sovereign's confidence, rapidly ascending military echelons as a keen tactician. The vividly illustrated saga Song of the Long March chronicles this spirited youth's teenage odyssey into myriad unforeseen quests, steadfast allies, and looming fierce adversaries. With daring plans, she defeats traitorous generals and earns the loyalty of brave soldiers for victory.