Yan Man, a street orphan, enters the wealthy and powerful Dai family estate under the guise of being a maid—but her true purpose is to uncover the truth behind her younger brother’s death. As she searches for answers, she unexpectedly captures the hearts of the two young masters of the family, becoming the center of their rivalry.

As the mystery deepens, Yan Man realizes her own life is at risk. To protect her, the second young master, Dai Jun Tao, arranges a fake marriage. But Yan Man's humble background and strong-willed nature make it difficult for her to adapt to life in the elite Dai household—especially as hidden secrets begin to surface.