New employee Su Wan orders a latte with light ice, only to discover that the shop has been cutting corners and skimping on the coffee. When she tries to address the issue, she is publicly humiliated. She gradually gathers evidence, including recordings and videos documenting her tests, and reports the coffee shop for its long-standing fraudulent practices, uncovering a scheme involving the property manager accepting bribes and protecting the business. In retaliation, she is subjected to online harassment, stalking, and malicious lawsuits, while workplace rumors make her professional life increasingly difficult. Calm and composed, Su Wan insists on defending her rights through legal channels and proves herself through her dedication to work, eventually earning a promotion. Through her own experience, she shows that ordinary people can also protect their rights and interests by relying on evidence and following the rules.