She is Princess Rong Xin of Xiqi, and she is also a secret agent Man Xin. To protect her sister's safety, she sneaked into Beilin, but unexpectedly encountered an unforgettable love and disaster.
Prince Beilin was worry-free and rebellious, and was her destined enemy. A relationship that started with exploitation cost her her sincerity. When the humiliation at the state banquet hit her like a sharp knife, she realized that he had never truly entered his world.
The deep affection of General Fu Zhao is the driftwood in her despair. A marriage that started with revenge is her most decisive counterattack against Wuyou.
Since then, the identities of the sisters have become a mystery, their love paths have become complicated, and intrigues and love and hate are intertwined. When the truth was revealed in blood, her black hair turned into snow and she returned from nirvana. How should she choose between the yearning for her old friend Rong Qi, Wuyou's deep regret, and Fu Zhao's silent protection? In this day's chess game, how will she make the move so that she can live up to the broken mountains and rivers and the deep love that lasts a lifetime?