Lin Zhi's family are authorized camera distributors, but her roommate arbitrarily hyped that popular cameras worth ten thousand yuan on the market could be group-bought for just 300 yuan, and even used classmate camaraderie to subject her to moral blackmail. Facing collective misunderstanding and pressure, Lin Zhi steadfastly adheres to principles and bottom lines, restoring the facts with standardized operational procedures. She not only guards the store's business guidelines, but also makes her classmates recognize the misconception of taking advantage of petty gains, learn rational consumption and respect for others' boundaries, and understand that there are no free lunches in the world.