Nangong Wan, the eldest princess, married and subsequently divorced three heirs of noble houses, one after another, solely to protect them. When her third husband, Pei Yi, asked to divorce her for the sake of a concubine-born young woman, she calmly let him go, while secretly setting an elaborate plan in motion. Demoted to a seventh-rank county magistrate, Pei Yi rediscovers his integrity in a remote border town and risks his life to stand against the powerful. Only then does he finally understand who truly deserves his protection. When the dust settles, can the apology he owes and the rest of his life make up for everything, and earn him a cup of tea with a lingering sweetness?