Chen Nan grew up practicing martial arts and farming deep in the mountains. Hoping for a peaceful life, he is unexpectedly sent down the mountain by his master to fulfill a marriage engagement, with a jade pendant entrusted to him. Along the way, he rescues Li Huiran from danger and discovers that she is the younger sister of his fiancée. Upon arriving at the Li family residence, the original bride, the eldest daughter, rejects the engagement, and Li Huiran volunteers to marry him in her sister's place. With each having their own reasons, the two become husband and wife. She hopes this marriage will earn her elders' favor and save the family's business.