Her older sister goes missing, so she takes her place as the bride. He is the famous Prince Cheng, and they marry by imperial decree. After the wedding, he treats her wonderfully, but it turns out to be a trap, a conspiracy. She is merely a pawn, yet she still gives her life to see the plot through, simply because she loves him deeply. Only when he is on his deathbed does he realize that he has already lost his heart. When he finally confesses his feelings, she says, "That year, those mountains, that water... we can never go back."
