Jiang Yurao was mistakenly married to the younger of two twin brothers, becoming a wife in name only and enduring three years as a substitute bride who received nothing but cold treatment. After her heart turned cold, she plotted her own fake death, concealed her identity, and traveled far to Northern Rong, determined to assassinate the King of Northern Rong. But on the night of the assassination, the king slowly removed his bronze mask, revealing the face of Shen Zhizhou, the man she had longed for day and night and who had been missing for so long. Torn between her duty to her country and her unforgettable former love, layers of past misunderstandings gradually come to light. Caught in a tangled web of love and hatred, she struggles to find a future for the two of them.