After being dumped in modern times, a heartbroken woman is struck by lightning on a rainy night and transmigrates as the side consort of an ambitious prince. Though breathtakingly beautiful, she is neglected by her husband. To find her unfaithful boyfriend, who transmigrated with her, she begins a battle of wits in the palace. Her childhood sweetheart has become a guard in the prince's household, and she thinks she has met a wealthy, handsome ancient man, only to discover that it is the beginning of a plot. After betrayal upon betrayal, and surviving by the skin of her teeth, where will love take her? Just when she thinks she has found the man of her dreams, the unexpected appearance of her modern boyfriend throws everything into disarray. Friend and foe are tangled together, and everyone has made her a promise, only to break it with a smile. Just when she thinks she is doomed beyond redemption, all the men around her die keeping their promises. At last, with love brought to this point, she sees where their true hearts lie, but national enmity and family hatred stand between them, and countless lives can never return to how they were. They live on, keeping their promises, but their hearts have long been dead.
