Ning He lost her beloved family at a young age. After lying low for ten years and changing her identity, she enters the Eastern Palace as a side consort under the name Wang Suihe, a frail young lady. In the treacherous depths of the imperial palace, she carefully plans her every move and skillfully navigates its dangers, all to obtain justice for her deceased mother and make the heartless man who betrayed her pay the price. From mutual suspicion and using each other for their own purposes to developing inexplicable feelings through spending their days and nights together, her relationship with the Crown Prince gradually changes. From a plainly dressed side consort to the Empress's throne, she finally clears her mother's name and obtains long-awaited justice. Yet this encounter, which began as a calculated scheme, ultimately leads to an unexpected and bittersweet ending.