Shen Nanwei is a modern culinary genius and financial prodigy. After being cast out of the marquis's residence and banished to an ancient alley, she builds her fortune from scratch using her culinary skills and financial acumen. She meets Xiao Duo, the regent king, a cold-blooded killer in the eyes of the world who lowers his guard only around her and willingly helps with even the smallest kitchen chores, such as chopping scallions. When her malicious younger half-sister repeatedly plots against her, Shen Nanwei swiftly and decisively dismantles every scheme, defeating her rival through sheer ability and determination. When the Great Yuan Kingdom faces a national crisis, she pioneers the issuance of war bonds to raise military funds and stabilize the court and public morale. She uses this opportunity to expand her business empire nationwide, eventually becoming the foremost imperial merchant. From an abandoned daughter fallen on hard times to a legendary businesswoman, she stands shoulder to shoulder with Xiao Duo through every storm, their love growing stronger as they become each other's most dependable support.