Zhou Yan holds her wedding at the lakeside homestay owned by her sister-in-law, Su Wantang. Without permission, she adds tables and rooms, upgrades the drinks, and declares that family shouldn't have to settle the bill. When the wedding ends, a bill for 670,000 yuan is waiting, but she refuses to pay a single cent and makes a scene. Her husband and mother-in-law take turns using emotional manipulation to pressure Su Wantang into covering the costs. Armed with a management contract signed in advance and records bearing the customers' signatures, Su Wantang pursues legal accountability and decisively divorces her husband, drawing a clear line around her premarital assets. In the end, Zhou Yan agrees to repay the debt in installments and faces reality, while Su Wantang successfully protects her property rights and personal boundaries.