In the wake of an ominous astrological prophecy foretelling disaster for the Tang Dynasty, a brutal coup erupts. Betrayed by his own brother, Crown Prince Li and his family are slaughtered—his wife and sons included. However, his daughter, Princess Yongning, narrowly escapes, only to be declared dead alongside the rest of her kin.
Fueled by vengeance, she sheds her identity and assumes the guise of a young man, Li Chang Ge. Determined to reclaim justice, she ventures to Shou Province, where her sharp intellect and strategic brilliance quickly earn her the trust of the ruling court. Rising through the military ranks, she navigates treacherous landscapes filled with powerful foes, steadfast allies, and unforeseen challenges.
Song of the Long March weaves a gripping tale of resilience, loyalty, and ambition as one young woman carves her own destiny amidst the shifting tides of war and betrayal.