Deep in the palace, Princess Lingxue lives a life in a golden cage. Her destiny has been arranged long ago, but the freedom and love she longs for are always drifting away amid endless constraints. By chance, she met the young and mysterious Prime Minister. The Prime Minister's dual identities - an assassin and a loyal official - plunged her into complex emotional entanglements. As the two of them continued to come into contact, the princess was gradually attracted by his wisdom and courage, and feelings in her heart quietly grew. However, the ancient customs in the palace are about to be restarted, and the fate of the princess once again faces a severe choice.
In order to protect her, the prime minister planned an escape, and the two spent a passionate and dangerous journey together. In the midst of escape and pursuit, their relationship grew deeper and deeper. However, fate did not leave them much choice. When the princess was controlled by forcible drugs, lost her memory, and forgot all the past, her life fell into a peaceful and empty cycle. Until one day, she unexpectedly discovered the memories hidden in her heart. The love and pain in her heart made her realize that the story she had with the Prime Minister had become a part of her that she could not let go of.
Under the shadow of the palace, the princess gradually found her true self. She was no longer the woman who lived for others, but a princess who dared to pursue herself. No matter what happened in the past, she finally learned how to fight against fate and find her own future among countless choices.