Following a fateful prophecy of doom for the Tang Dynasty, a tragic coup orchestrated by the crown prince's own brother results in the demise of the prince, his family, and the survival of his daughter, Princess Yongning. Believed to be deceased, the princess adopts a new identity as the young man Li Chang Ge, determined to seek vengeance. Venturing to the Shou province, Li Chang Ge, with cunning and skill, ingratiates herself with the Shou emperor and rises swiftly through the military ranks as a master strategist. The visually captivating tale of Song of the Long March delves into the princess's journey of youth, marked by unforeseen challenges, loyal friendships, and formidable foes that lie ahead.