After her father dies, her stepmother forces her to marry a scoundrel and gives her a potion to make her infertile. Then an imperial edict grants her in marriage to the sickly Seventh Prince.
Everyone says he won't live long. But she can tell: he isn't ill, he's been poisoned.
"Your Highness, I can cure your poison." "Why help me?" "Because I need someone powerful to protect me. So do you."
From then on, she saves his life, and he keeps her safe. She plays his zither, and he listens to her for a lifetime.
From hidden attacks in the inner residence to deadly struggles at court, two people abandoned by fate are driven to the brink time and again, only to pull each other back out.
At his coronation, he tells the assembled officials, "I will have only one woman in my harem: the Empress."
Their zither and song finally reach their highest note.
Theme: Two people with tragic fates save each other, rising from the abyss to the heights, their zither and song in harmony, their melody never ending.