After losing her homeland and everything she once knew, Jing finds a new home within the Kingdom of Xuanhe. There, she meets the Seventh Prince, a boy whose fate becomes inseparably linked with her own. From childhood companions to lifelong confidants, they grow together through years of joy, sorrow, sacrifice, and change. As time passes, their bond deepens, strengthened by the promise they make to one another—a promise to remain by each other's side no matter what challenges fate may bring. Timeless Promise is a story of loyalty, destiny, and an unbreakable bond that endures through the passage of time. The title signifies a promise so profound that it survives every trial, every separation, and even death itself, remaining unchanged across a lifetime and beyond.